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SLS / Orion / Beyond-LEO HSF - Constellation => Heavy Lift Launch Vehicle (HLV/SLS) => Topic started by: RocketLover0119 on 04/01/2022 04:55 pm

Title: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: RocketLover0119 on 04/01/2022 04:55 pm
No specific thread for this yet and I figure we need one.

NSF article from rollout:

https://www.nasaspaceflight.com/2022/03/sls-rollout-wet-dress-rehearsal/

Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: RocketLover0119 on 04/01/2022 06:21 pm
The CAA was retracted from Orion earlier.

KSC Newsroom feed
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: RocketLover0119 on 04/01/2022 06:55 pm
Starting to get real!

https://twitter.com/NASA8500/status/1509966227879481349?s=20&t=Po_Jzy0M7fMWRqyQC1N8CQ
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: RocketLover0119 on 04/01/2022 09:16 pm
Now under L-45 hours, the launch team has arrived at firing room 1 for this weekends test.

https://twitter.com/nasagroundsys/status/1510000154547568644?s=21&t=V1EiVG3ruafo9dRKjzGuzw
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 04/01/2022 09:51 pm
The CAA was retracted from Orion earlier.

KSC Newsroom feed
Looking marvellous!
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: ChrisC on 04/02/2022 02:11 am
KSC Newsroom feed

... is linked below this tweet:

https://twitter.com/BoeingSpace/status/1510007200399376387

https://www.youtube.com/watch?v=OCDwDrnrePo
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: russianhalo117 on 04/02/2022 02:25 am
The CAA was retracted from Orion earlier.

KSC Newsroom feed
Looking marvellous!
No longer so via the feed since camera is not in automatic mode or being attended and controlled. It is more impressive with the mark one eyeballs.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 04/02/2022 05:50 am
The CAA was retracted from Orion earlier.

KSC Newsroom feed
Looking marvellous!
No longer so via the feed since camera is not in automatic mode or being attended and controlled. It is more impressive with the mark one eyeballs.
Actually, yes. I agree with you.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: hektor on 04/02/2022 08:09 am
Don’t stop me now: countdown to launch (https://blogs.esa.int/orion/2022/04/01/dont-stop-me-now-countdown-to-launch/)
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/02/2022 01:05 pm

Countdown Progressing for Artemis I Wet Dress Rehearsal (https://blogs.nasa.gov/artemis/2022/04/02/countdown-progressing-for-artemis-i-wet-dress-rehearsal/)



Around 3 a.m. on Saturday April 2, at approximately L-35 hours and 20 minutes, the Artemis I launch control team powered up the Space Launch System rocket’s core stage, which will be loaded with more than 700,000 gallons of propellants during the tanking phase of the countdown. During the day, teams will charge Orion flight batteries, conduct final preparations on umbilical arms, and conduct a final pre-launch walkdown.


While operations at the pad may not be visible during today’s activities at the launch pad, NASA is streaming live video of the rocket and spacecraft on the Kennedy Newsroom YouTube channel.


NASA is also sharing updates on the Exploration Ground Systems Twitter account. Real-time updates from Jeremy Parsons, deputy manager of the Exploration Ground Systems Program, will begin on the account when the launch director and mission management team chair give a “go” for tanking operations, expected to occur around 7 a.m. EDT on Sunday, April 3.


NASA will provide an update after the conclusion of a weather briefing at 10 a.m. EDT.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/02/2022 03:19 pm
Weather Still Favorable for Artemis I Wet Dress Rehearsal (https://blogs.nasa.gov/artemis/2022/04/02/weather-still-favorable-for-artemis-i-wet-dress-rehearsal/)

Meteorologists with the U.S. Space Force Space Launch Delta 45 currently predict favorable weather conditions for tanking on April 3. Forecast for this afternoon slightly improved from yesterday. There is currently less than a 5% chance of lightning within five nautical miles of the launch pad. Weather constraints stipulate there must be less than a 20% chance lightning within 5 nautical miles of pad during the first hour of tanking. Meteorologists are also predicting a 10% chance of winds greater than 23 knots on April 3, when tanking begins. Winds must not be above 37.5 knots and the temperature cannot be below 41 degrees Fahrenheit.

The launch team is monitoring the potential for severe weather in the area later today and adjusting planned outdoor activities to remain on track for the wet dress rehearsal schedule.

While operations at the pad may not be visible during today’s activities at the launch pad, NASA is streaming live video of the rocket and spacecraft on the Kennedy Newsroom YouTube channel.

NASA is also sharing updates on the Exploration Ground Systems Twitter account. Real-time updates from Jeremy Parson, deputy manager of the Exploration Ground Systems Program, will begin on the account when the launch director and mission management team chair give a “go” for tanking operations, expected to occur around 7 a.m. EDT on Sunday, April 3.

The next blog update will be provided after the side flame deflectors are moved into place, which is expected to occur around 5:40 p.m. or L-21 hours.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/02/2022 03:32 pm
For those who want to keep up with the testing and WDR, I listed all the milestones mentioned by NASA (https://www.nasa.gov/content/artemis-i-launch-countdown-101) as well as the approximate times for each milestone, remember that these times may change due to unannounced or unplanned delays in the plans.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: RocketLover0119 on 04/02/2022 03:54 pm
Orion is powered on!

https://twitter.com/nasa_orion/status/1510250551895891979
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: haywoodfloyd on 04/02/2022 04:43 pm
Wasn't it powered on last night?
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/02/2022 04:56 pm
Wasn't it powered on last night?
Yes, it turned on at about 02:40 UTC according to NASA's schedule.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: RocketLover0119 on 04/02/2022 07:04 pm
Moving of the flame deflectors is occurring/occurred.

https://twitter.com/NASAGroundSys/status/1510324824618450945
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: DaveS on 04/02/2022 07:30 pm
Moving of the flame deflectors is occurring/occurred.

https://twitter.com/NASAGroundSys/status/1510324824618450945
Not yet. The SRB Side Flame Deflectors (SFDs) are still in the standard pre-launch positions.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Mark S on 04/02/2022 08:12 pm
Wee bit of weather at the moment. Truly a "wet" dress rehearsal.

Is the WDR still proceeding, with all these thunderstorms blowing through?

Edit: Never mind, I see that that actual WDR is scheduled for tomorrow. We are in the countdown TO the WDR, not the countdown OF the WDR.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 04/02/2022 09:46 pm
Jesus wept! That storm!
Speaking of which, I Googled the weather in Cape Canaveral, and here's what I found:

It's a report from National Weather Service who is tracking a severe thunderstorm that is currently striking Florida at this time. On the plus side, it is scheduled to be sunny tomorrow, according to BBC Weather:
https://www.bbc.co.uk/weather/4149959

For those who are wondering, KSC is in Brevard County.

Severe Thunderstorm Watch
Florida
6 hours ago – National Weather Service

SEVERE THUNDERSTORM WATCH 90 IS IN EFFECT UNTIL 700 PM EDT
FOR THE FOLLOWING LOCATIONS
FL

.    FLORIDA COUNTIES INCLUDED ARE
BREVARD              CITRUS              FLAGLER
HERNANDO             INDIAN RIVER        LAKE
LEVY                 MARION              MARTIN
OKEECHOBEE           ORANGE              OSCEOLA
PASCO                POLK                PUTNAM
SEMINOLE             ST. LUCIE           SUMTER
VOLUSIA
Expires in 1 hr.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 04/02/2022 09:49 pm
Also, the storm is affecting Spaceflight Now's livestream. Please stand by while they try to resolve this. On the other hand, the KSC Newsroom livestream is doing fine.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/02/2022 10:11 pm
https://twitter.com/NASAGroundSys/status/1510378921656737795
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: webdan on 04/02/2022 10:11 pm
We're getting pelted right now on the west coast, you'll be getting more soon.

No rain for months and twice in 3 days. Summer is coming :)
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/02/2022 10:14 pm
I managed to take a screenshot of this deleted tweet from EGS indicating that one of the three towers was struck by lightning.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Navier–Stokes on 04/02/2022 10:15 pm
https://twitter.com/NASAGroundSys/status/1510378920356556806?t=9i-La1h__lPXoKPNyfvU2A

https://twitter.com/NASAGroundSys/status/1510378921656737795?t=03Hgyy2OtFOdlIm2n6V4vQ
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/02/2022 10:28 pm
I managed to take a screenshot of this deleted tweet from EGS indicating that one of the three towers was struck by lightning.
https://twitter.com/JerryPikePhoto/status/1510376532929302528
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: sdsds on 04/02/2022 10:56 pm
https://twitter.com/JerryPikePhoto/status/1510376532929302528

Has this been independently confirmed? There appears to have been a strike on the mobile launch tower, not one of the three lightening towers at the pad.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/02/2022 11:10 pm
https://twitter.com/JerryPikePhoto/status/1510376532929302528 (https://twitter.com/JerryPikePhoto/status/1510376532929302528)

Has this been independently confirmed? There appears to have been a strike on the mobile launch tower, not one of the three lightening towers at the pad.
https://twitter.com/NASAGroundSys/status/1510384297403891716
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: sdsds on 04/02/2022 11:17 pm
Here's a frozen frame. The 3 lightening towers are each visible and nowhere near the lightning. Is the video from which this is a still grab authentic?

EDIT to add: some report the strike was on the (catenary) wiring which is behind the ML from this perspecitve.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/02/2022 11:47 pm
Here's a frozen frame. The 3 lightening towers are each visible and nowhere near the lightning. Is the video from which this is a still grab authentic?

EDIT to add: some report the strike was on the (catenary) wiring which is behind the ML from this perspecitve.

The lightning hit in one of the rooms and the video is real, it was taken from the transmission, I was trying to take it on my own but someone was faster.

Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Navier–Stokes on 04/03/2022 12:01 am
https://twitter.com/NASAGroundSys/status/1510386424247459846?t=1SyOnPcbgQSvtZwdBNH1uw
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/03/2022 03:34 am

Teams Proceeding with Overnight Operations for Artemis I Wet Dress Rehearsal (https://blogs.nasa.gov/artemis/2022/04/02/teams-proceeding-with-overnight-operations-for-artemis-i-wet-dress-rehearsal/)



Engineers confirmed there were four lightning strikes to the lightning towers within the perimeter of Launch Pad 39B. Teams have determined the first three were low intensity strikes to tower two and are continuing to review data from the fourth strike, which was higher in intensity to tower one. At the time of the strikes, Orion and the Space Launch System (SLS) core stage were powered up and the solid rocket boosters and interim cryogenic propulsion stage (ICPS) were not. Teams currently see no constraints to proceeding with the test countdown timeline as planned and will continue procedures to power up the SLS boosters and ICPS overnight.


Overnight, engineers will also work to make up time for activities that were paused due to the severe weather. The Mission Management Team will review the schedule and data from the power ups and sensors at the pad at a 6 a.m. EDT tanking meeting before making the decision to proceed with the test.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: cplchanb on 04/03/2022 11:55 am
https://twitter.com/NASAGroundSys/status/1510571879538601985?s=20&t=GKIMUj56fKz1mYNof2ttig


It's a go for tanking!!!
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 04/03/2022 11:57 am
What is JP?
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: DaveS on 04/03/2022 12:20 pm
What Who is JP?
https://twitter.com/NASAGroundSys/status/1509934664437354502
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: RocketLover0119 on 04/03/2022 12:23 pm
Holding at H-6 hours.

Team heading to pad to work something related to ML pressure.

https://twitter.com/NASAGroundSys/status/1510593632063168514

SpaceflightNow
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/03/2022 12:24 pm
https://twitter.com/SpaceflightNow/status/1510591779502014469?cxt=HHwWioC-nYrO2fYpAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/03/2022 01:16 pm
https://twitter.com/cbs_spacenews/status/1510604215542071308?cxt=HHwWmIC--fmh3_YpAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/03/2022 01:42 pm
https://twitter.com/NASAGroundSys/status/1510611694598381572?cxt=HHwWiICzoaXV4vYpAAAA
https://twitter.com/SpaceflightNow/status/1510613378108121091?cxt=HHwWhoCzsaS34_YpAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/03/2022 02:33 pm
The hold was briefly released for a few seconds, but has now recycled back to T-6 hours and holding.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: RocketLover0119 on 04/03/2022 02:38 pm
Counting!

https://twitter.com/NASAGroundSys/status/1510625743155482627?s=20
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/03/2022 02:41 pm
Still in a hold, unless the NASA countdown clock is incorrect.

Credit: Spaceflightnow

https://www.youtube.com/watch?v=B6OJZsTJuTA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/03/2022 02:50 pm
Countdown timeline is being synced, but the go for cryo loading has been given and they're now into pre-ops.

https://twitter.com/NASAGroundSys/status/1510630176492769284

Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/03/2022 03:02 pm
Aiming for a T-0 of 6:10pm Eastern

https://twitter.com/NASAGroundSys/status/1510631178956644352
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: RocketLover0119 on 04/03/2022 03:24 pm
Holding again  :-\

https://mobile.twitter.com/NASAGroundSys/status/1510635410610962438
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: RocketLover0119 on 04/03/2022 03:50 pm
Scrub!

https://twitter.com/SpaceflightNow/status/1510645086660481030
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/03/2022 04:14 pm
https://twitter.com/cbs_spacenews/status/1510647054510563333?cxt=HHwWioC9kcHf8vYpAAAA
https://twitter.com/NASA/status/1510650025260445696?cxt=HHwWgMCr-baM9PYpAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: dsmillman on 04/03/2022 05:37 pm
The latest:

April 03, 2022
MEDIA ADVISORY M22-045

NASA to Provide Update Today on Last Major Artemis Test Before Launch

NASA will hold a media teleconference at 5:30 p.m. EDT today, Sunday, April 3, to discuss the status of the final major test with the agency’s mega Moon rocket and spacecraft at the launch pad ahead of the uncrewed Artemis I lunar mission.

The approximately two-day test, known as the wet dress rehearsal, began Friday, April 1, and was halted Sunday prior to tanking due to loss of ability to pressurize the mobile launcher using two fans. The fans are needed to provide positive pressure to the enclosed areas within the mobile launcher and keep out hazardous gases. Without this capability, technicians are unable to safely proceed with remotely loading the propellants into the rocket’s core stage and interim cryogenic propulsion stage.

The test is designed to demonstrate the ability to conduct a full launch countdown at Kennedy Space Center’s Launch Pad 39B, including loading and draining cryogenic, or supercold, propellants into the Artemis I rocket. 
Teleconference participants include:

•   Mike Sarafin, Artemis mission manager, NASA Headquarters in Washington
•   Charlie Blackwell-Thompson, Artemis launch director, NASA Exploration Ground Systems program, Kennedy

To participate by telephone, media must RSVP to NASA no later than one hour prior to the start of the event to: [email protected]

Through Artemis missions, NASA will land the first woman and the first person of color on the Moon, paving the way for a long-term lunar presence and serving as a steppingstone on the way to Mars.

For updates, follow along on NASA’s Artemis blog at:
https://blogs.nasa.gov/artemis/
-end-
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: zubenelgenubi on 04/03/2022 10:24 pm
Any news from the teleconference?
The latest:

April 03, 2022
MEDIA ADVISORY M22-045

NASA to Provide Update Today on Last Major Artemis Test Before Launch

NASA will hold a media teleconference at 5:30 p.m. EDT today, Sunday, April 3, to discuss the status of the final major test with the agency’s mega Moon rocket and spacecraft at the launch pad ahead of the uncrewed Artemis I lunar mission.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: DaveS on 04/03/2022 10:36 pm
https://twitter.com/cbs_spacenews/status/1510741511100583943

https://twitter.com/cbs_spacenews/status/1510742947742027781

https://twitter.com/cbs_spacenews/status/1510743480116654090
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: gbl on 04/03/2022 10:37 pm
Link to the media teleconference:
https://www.youtube.com/watch?v=9jPTnp7BEvw (https://www.youtube.com/watch?v=9jPTnp7BEvw)
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: sdsds on 04/03/2022 11:46 pm
•   Mike Sarafin, Artemis mission manager, NASA Headquarters in Washington
•   Charlie Blackwell-Thompson, Artemis launch director, NASA Exploration Ground Systems program, Kennedy

Sarafin: speaking as chair of mission management team (MMT), knew weather would be a challenge, weather officer predicted 80% chance of lightning. They didn't have hail, which was also a possibility. One lightning strike was a "positively charged cloud to ground strike" on a catenary wire. Agreed to "proceed at risk" into tanking while that one was cleared. "A couple of technical issues out at the pad." MMT scrub meeting this afternoon decided to set up for tomorrow. A few issues to work through. "Having a lot of new experiences." The lightning protection system did its job perfectly. Tag team meeting was at 0600. "Confident we're going to get there soon."

Blackwell-Thompson: crew access arm was retracted prior to call to stations. Weather did bring a stop to operations; high wind and potential for lightning. Timeline set back about 4 hours. "Big steel moved" includes engine service platform dropped and pulled back to launch position, side flame deflectors in position, extensible column jacked. 715 730 notified of supply fan issue. Fans located in remote air building along perimeter ... feeds air to ctcr (?), ml, ecs room under pad. Supply fan two had a breaker trip; sent a team in to look. Unable to resolve. Switched to redundant fan and decided to press on. Second fan had a different fault. Did not have remote visibility of that fault. Purpose of pressurization is to prevent hazardous gas intrusion during load. All flight hardware elements will remain powered up except booster. Back to tanking tomorrow. Begin around 7:00 tomorrow morning.

Bill Harwood for Charlie: What are trying to accomplish with two terminal countdown runs? If you had a time crunch and could only do one, which would you do?

Blackwell-Thompson: would like to demonstrate ability to recycle, and validate that timeline and the ability to do it within 2 hour window. Trained with sim but want to validate with flight hardware in a test situation. Priority would be to demonstrate "launch-ready hold" capability.

Esam Aned of ASP: timeline

Jeff Foust: If they can't complete tomorrow, how do they share the range.

Sarafin: If they had loaded cryo they would need to stand down prior to another attempt. If they hadn't loaded cryo [they would deconflict somehow].

Philip Sloss (NSF): question about fan systems.

Blackwell-Thompson: fan runs in two modes, normal and hazardous. on Friday they did test hazardous mode. Had been running several hours in hazardous mode before encountering problem. No reason to think it is related to lightning.

Stephen Clarke (SFN): do the fans supply air or gn2; is the cut-off triggered by human action or pre-programmed.

Blackwell-Thompson: air, not gn2. Two ways to do cut-off. Parameters in flight software will force the cut-off inside of 10 seconds. Backup is manual capability to do the cutoff. 3 different "I-load" (?) parameters protect. Plus, operator with hand poised on the button.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: cplchanb on 04/04/2022 12:22 am
Hopefully this is a case of just replacing the breaker or even the fan and not some more serious. It was working all morning so perhaps something just burnt or shorted out
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 04/04/2022 06:42 am
Hopefully this is a case of just replacing the breaker or even the fan and not some more serious. It was working all morning so perhaps something just burnt or shorted out
I hope so, too.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: eeergo on 04/04/2022 12:08 pm
Count still not running. Reason unclear at this point (was supposed to pick up half an hour ago).
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: eeergo on 04/04/2022 12:26 pm
Reason for the delay given: "outage with the vendor of GN2". MMT ready to restart the count at T-6:40 (L-7:20). Guess it's related to the purging system from yesterday?

https://twitter.com/NASAGroundSys/status/1510956346627268609
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: cplchanb on 04/04/2022 12:29 pm
https://twitter.com/NASAGroundSys/status/1510956346627268609?s=20&t=glejcOJoXAteDdHRF3kJgQ

Go for tanking again
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: eeergo on 04/04/2022 12:44 pm
Interesting tidbit about the hardware that caused yesterday's scrub:

https://twitter.com/SpcPlcyOnline/status/1510958816472584192
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 04/04/2022 12:46 pm
Link to the media teleconference:
https://www.youtube.com/watch?v=9jPTnp7BEvw (https://www.youtube.com/watch?v=9jPTnp7BEvw)
By the way, how did you post the video? It was unlisted.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: gbl on 04/04/2022 12:58 pm
Link to the media teleconference:
https://www.youtube.com/watch?v=9jPTnp7BEvw (https://www.youtube.com/watch?v=9jPTnp7BEvw)
By the way, how did you post the video? It was unlisted.
It's a link from https://www.nasa.gov/nasalive (https://www.nasa.gov/nasalive)
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: yg1968 on 04/04/2022 01:11 pm
https://twitter.com/NASAGroundSys/status/1510964254849081346
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: yg1968 on 04/04/2022 01:22 pm
https://twitter.com/genejm29/status/1510955120615641092
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/04/2022 01:33 pm
https://twitter.com/NASAGroundSys/status/1510973220844974080
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/04/2022 02:35 pm
Despite the above, the hold continues to be extended with no word on what the issue is (if there is one).
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: cplchanb on 04/04/2022 02:43 pm
Probably double and triple checking the systems again
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: eeergo on 04/04/2022 02:52 pm
Current view (obviously not much to be seen apart from the stationary scene):
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/04/2022 02:53 pm
T-6hrs 38 minutes and COUNTING! Preps for prop load are now proceeding in earnest as the count has begun.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: RocketLover0119 on 04/04/2022 02:57 pm
https://mobile.twitter.com/NASAGroundSys/status/1510994019693871104
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: eeergo on 04/04/2022 02:59 pm
Chilldown of the LOX system is in work.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: yg1968 on 04/04/2022 03:00 pm
Quote from: NASA
The countdown for the wet dress rehearsal has resumed at 10:52 a.m. EDT and clocks have picked back up at T-6 hours, 40 minutes on the clock (L-7 hours, 20 minutes). A new planned T-0 of 6:02 p.m. has been established.

https://blogs.nasa.gov/artemis/2022/04/04/artemis-i-wdr-update-go-to-proceed-for-tanking-countdown-resumes/
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: RocketLover0119 on 04/04/2022 03:01 pm
Core stage LOX chill down underway.

https://twitter.com/NASAGroundSys/status/1510995118500859921?s=19
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: cplchanb on 04/04/2022 04:22 pm
https://twitter.com/NASAGroundSys/status/1511015064144330754?s=20&t=DM7LTji1DiIn1EApiQRrZA

Sensor limit reached for LOX.... hopefully it's a quick settings change and they were too conservative like green test 1
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/04/2022 04:46 pm
https://twitter.com/NASAGroundSys/status/1511017175821209606?cxt=HHwWjMCy5bOHm_gpAAAA
https://twitter.com/NASAGroundSys/status/1511021825274396686?cxt=HHwWnIC-9YSWnfgpAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/04/2022 04:53 pm
https://twitter.com/SpaceflightNow/status/1511016815069179907?cxt=HHwWhsC5_bPymvgpAAAA
https://twitter.com/cbs_spacenews/status/1511016218781790211?cxt=HHwWhsC9pdnPmvgpAAAA
https://twitter.com/cbs_spacenews/status/1511018110702215171?cxt=HHwWhoCzmem9m_gpAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/04/2022 05:18 pm
There continues to be no sign of propellant loading. Running about ~5 hours behind schedule.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: hektor on 04/04/2022 05:27 pm
https://twitter.com/NASAGroundSys/status/1511032032020869120?s=20 (https://twitter.com/NASAGroundSys/status/1511032032020869120?s=20)
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: saturnapollo on 04/04/2022 05:51 pm
I would rather all the bugs were ironed out now than on launch day. NASA cannot afford this launch to fail - they might not get another try I suspect.

Keith
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 04/04/2022 05:53 pm
I would rather all the bugs were ironed out now than on launch day. NASA cannot afford this launch to fail - they might not get another try I suspect.

Keith
I agree.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/04/2022 05:58 pm
https://twitter.com/SpaceflightNow/status/1511034919581065222?cxt=HHwWjIC5jZ2Qo_gpAAAA
https://twitter.com/cbs_spacenews/status/1511037744952324101?cxt=HHwWisC54de0pPgpAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: oldAtlas_Eguy on 04/04/2022 06:00 pm
What concerns me is that since this issue is very close to identical to one encountered by the Green Run and solved then almost 1- 1/2 years ago. That brings into question as to whether these procedures had even been revisited and updated since the Green Run with lessons learned.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: cplchanb on 04/04/2022 06:15 pm
What concerns me is that since this issue is very close to identical to one encountered by the Green Run and solved then almost 1- 1/2 years ago. That brings into question as to whether these procedures had even been revisited and updated since the Green Run with lessons learned.

How is this the same? The green run had the issue during firing while this one is with the LOX sensor.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/04/2022 06:32 pm
- 03:00:00
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: rdale on 04/04/2022 06:35 pm
What concerns me is that since this issue is very close to identical to one encountered by the Green Run and solved then almost 1- 1/2 years ago.

I'm not sure it's close - let alone identical - to that issue. Where are you hearing this?
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/04/2022 06:37 pm
Into LOX chilldown. Pressing ahead.

https://twitter.com/NASAGroundSys/status/1511049946304327682
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/04/2022 06:42 pm
https://twitter.com/SpaceflightNow/status/1511051552664039432?cxt=HHwWkMC9nbPYqvgpAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: ulm_atms on 04/04/2022 06:47 pm
What concerns me is that since this issue is very close to identical to one encountered by the Green Run and solved then almost 1- 1/2 years ago. That brings into question as to whether these procedures had even been revisited and updated since the Green Run with lessons learned.

How is this the same? The green run had the issue during firing while this one is with the LOX sensor.
SLS's first WDR. https://forum.nasaspaceflight.com/index.php?topic=44402.msg2165617#msg2165617
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 04/04/2022 06:50 pm
What concerns me is that since this issue is very close to identical to one encountered by the Green Run and solved then almost 1- 1/2 years ago. That brings into question as to whether these procedures had even been revisited and updated since the Green Run with lessons learned.

How is this the same? The green run had the issue during firing while this one is with the LOX sensor.
SLS's first WDR. https://forum.nasaspaceflight.com/index.php?topic=44402.msg2165617#msg2165617
I remember that! I was the last person to add to that thread.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: oldAtlas_Eguy on 04/04/2022 06:54 pm
What concerns me is that since this issue is very close to identical to one encountered by the Green Run and solved then almost 1- 1/2 years ago. That brings into question as to whether these procedures had even been revisited and updated since the Green Run with lessons learned.

How is this the same? The green run had the issue during firing while this one is with the LOX sensor.
Based on a tweet by NASA EGS. NASA may have intentionally took note of but ignored intentionally such possible issues encountered during the Green run related to engineering expectations as to how the WDR should run and its limits settings in order to find the ones that do not and to then understand why.

Also as to some of my post is when I tried to trace down details, the exact items as mentioned that would make the two occurrences close to being the same was not found. The NASA EGS tweet has alleviated some of my concerns about thier preparedness and goals  for this test. Some of those goals may go against the group that is other than engineering motivated though.

Added: See post below.

That does not change my reevaluation of NASA engineering goals for this test though and how they intentionally pushed the limits to what things domineeringly should be the case vs the experienced ones encountered in the Green Run. Since a similar one occurred again likely means there is some sort of error in the models being used.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: cplchanb on 04/04/2022 06:56 pm
What concerns me is that since this issue is very close to identical to one encountered by the Green Run and solved then almost 1- 1/2 years ago. That brings into question as to whether these procedures had even been revisited and updated since the Green Run with lessons learned.

How is this the same? The green run had the issue during firing while this one is with the LOX sensor.
SLS's first WDR. https://forum.nasaspaceflight.com/index.php?topic=44402.msg2165617#msg2165617

Good spot. We'll... I guess we'll find out during the next press briefing. Until then it's full speed ahead to tanking and hopefully an evening countdown
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: cplchanb on 04/04/2022 07:22 pm
https://twitter.com/NASAGroundSys/status/1511060935393398789?s=20&t=yWqHFCFtB1M1RCQ5raB_8Q


Finally its happening!!!!!!
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/04/2022 07:22 pm
Is this the right thread to post WDR updates? A lot of discussion going on.

LOX slow fill has started! Roughly 7 hours behind the original schedule.

https://twitter.com/NASAGroundSys/status/1511060935393398789
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/04/2022 07:29 pm
Starting to see some vapors ticking up at the bottom of the MLP. This is a good sign that fueling is progressing.

Welcome back to action LC-39B!
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/04/2022 07:30 pm
Is this the right thread to post WDR updates? A lot of discussion going on.

LOX slow fill has started! Roughly 7 hours behind the original schedule.

https://twitter.com/NASAGroundSys/status/1511060935393398789 (https://twitter.com/NASAGroundSys/status/1511060935393398789)
This is the correct thread, you can see some activity at the base of the rocket due to LOX loading.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/04/2022 07:32 pm
LOX fast fill has started.

https://twitter.com/NASAGroundSys/status/1511063772827422726

Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/04/2022 07:40 pm
At this point we should be well into LH2 chilldown & coming up on LH2 slow fill start.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: RocketLover0119 on 04/04/2022 07:45 pm
LH2 chilldown has begun!

https://twitter.com/NASAGroundSys/status/1511066952218910729?s=20&t=qYY5J9fZTDc0v7vIL3H0UQ
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/04/2022 08:06 pm
We've yet to receive word about LH2 filling, but if they're on the original timeline we should be well into it.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/04/2022 08:14 pm
https://twitter.com/NASAGroundSys/status/1511074321644597253

https://twitter.com/NASAGroundSys/status/1511080413732782088
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: hektor on 04/04/2022 09:00 pm
Scrub
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 04/04/2022 09:02 pm
Scrub
I knew it. Countdown clock is holding at T-31:36.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: oldAtlas_Eguy on 04/04/2022 09:11 pm
https://twitter.com/NASAGroundSys/status/1511074321644597253

https://twitter.com/NASAGroundSys/status/1511080413732782088
A probable pneumatic actuated valve that is controlled via a likely electronic small valve in the ML that pressurizes the tube going up to the bigger on 160 level ML valve. You want a separation from the LH2 valves from electricity. There are multiple failure points that it could be. Hopefully something simple easily found and corrected.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: hektor on 04/04/2022 09:12 pm
So when is the next attempt ? after AX-1 (NET 4/9/2022) ?
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: waf102 on 04/04/2022 09:13 pm
That's a scrub.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: oldAtlas_Eguy on 04/04/2022 09:43 pm
Did they ever have such problems on the ML during the Apollo missions?

Yes: https://history.nasa.gov/afj//ap11fj/pdf/stephen-coester-apollo11-lh2-leak.pdf
An additional is that all the launch providers have had similar types of prop loading problems from time to time, ULA and SpaceX included. Everyone has had problems with their GSE throughout the life of their LV launch operations.

An additional is that AX-1 has a hotfire midday on the 6th. So tomorrow is still open for another try maybe. Else it is a cascading slip to both AX-1 and Crew 4. There would be not enough space between Crew 4 and the OFT-2 to do a AX-1 mission after Crew 4 without slipping OFT-2. Delaying AX-1 any significant amount can make significant problems for all of the ISS ops. A day or 2 possible but not 3 or 4. Note here is that AX-1 and Crew 4 is currently in a day for day slip scenario. a couple of days OK. A week is not.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: zubenelgenubi on 04/04/2022 11:42 pm
Moderator:
I split/merged 18? posts to the Artemis I discussion thread.  They were less directly related to the business at hand.

The WDR should now be easier to follow in this thread.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: cplchanb on 04/05/2022 01:32 am
Any news on next steps? Hopefully this is a simple fix with the panels or breakers. They said a big reason why they scrubbed was it happened so late in the day. Perhaps if it occurred in the morning they couldve spent more time to troubleshoot and maybe solve the issue.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: [email protected] on 04/05/2022 02:19 am
Any news on next steps? Hopefully this is a simple fix with the panels or breakers. They said a big reason why they scrubbed was it happened so late in the day. Perhaps if it occurred in the morning they couldve spent more time to troubleshoot and maybe solve the issue.
The next attempt is likely several days away, so no
https://twitter.com/SpaceflightNow/status/1511107003522994178?t=f6PhtroBde0Ue24rw3ysCg&s=19
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: FutureSpaceTourist on 04/05/2022 11:13 am
https://blogs.nasa.gov/artemis/2022/04/04/artemis-i-wet-dress-rehearsal-called-off-for-april-4/

Quote
Artemis I Wet Dress Rehearsal Called off for April 4

The Artemis I team has ended today’s attempt at the wet dress rehearsal test at 5 p.m. The countdown ended after partially loading liquid oxygen into the Space Launch System core stage tank. This provided the teams a valuable opportunity for training and to make sure modeled loading procedures were accurate. This was the first time using new systems at NASA’s Kennedy Space Center Launch Complex 39B. The team was able to monitor the Artemis I core stage as it was exposed to cryogenic liquids and gather data that will inform updates to propellant loading procedures.

After troubleshooting a temperature limit issue for the liquid oxygen, which delayed the countdown by several hours, the team successfully developed a new procedure for loading the liquid oxygen and filled the tank to 50 percent. Liquid oxygen is an extremely cold, or cryogenic, propellant that is maintained at minus 297 degrees Fahrenheit.

During chilldown of the lines in preparation for loading the liquid hydrogen, the teams encountered an issue with a panel on the mobile launcher that controls the core stage vent valve. The purpose of the vent valve is to relieve pressure from the core stage during tanking. Given the time to resolve the issue as teams were nearing the end of their shifts, the launch director made the call to stop the test for the day. A crew will investigate the issue at the pad, and the team will review range availability and the time needed to turn systems around before making a determination on the path forward.

The wet dress rehearsal is the last major test before launch. This test allows the team to practice propellant loading and thoroughly check out the Artemis I rocket systems as they are exposed to cryogenics.

The note about range availability suggests NASA wants to avoid impact to the Axiom-1 launch (which makes sense given the potential consequences to the ISS schedule, as noted up thread).
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 04/05/2022 11:52 am
According to an Instagram story post from @nasaartemis on Instagram, NASA ended the WDR test after encountering a vent valve issue while loading propellent into the SLS fuel tank. NASA plans to provide another update during a media teleconference at 5 p.m. EDT (9 p.m. GMT).
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: ChrisC on 04/05/2022 02:48 pm
Media call at 4pm ET.  I hope this one gets up onto Youtube faster than Sunday's, or they don't hide it as "unlisted".  Either way, gracious thanks to whoever finds it and posts it here.

https://twitter.com/JimFree/status/1511321898654875656
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Targeteer on 04/05/2022 05:43 pm
April 05, 2022
MEDIA ADVISORY M22-046
NASA to Discuss Final Test Status Today Before Artemis Moon Mission

NASA will hold a media teleconference at 4 p.m. EDT today on Tuesday, April 5, to provide another update on the final major test with the agency’s mega Moon rocket and Orion spacecraft at the launch pad ahead of the uncrewed Artemis I lunar mission. Audio of the teleconference will stream live on the agency’s website.

During the approximate two-day test known as a wet dress rehearsal, NASA encountered an issue Monday, April 4, with a panel on the mobile launcher that controls the core stage vent valve. The purpose of the valve is to relieve pressure from the rocket’s core stage during tanking. NASA’s launch director made the call to stop the test given the time to resolve the issue as teams were nearing the end of their shifts.

At the time the test ended, the team had loaded about 50% of the liquid oxygen into the Space Launch System rocket core stage. Teams are reviewing range availability and the time needed to turn systems around before determining another attempt to conduct the wet dress rehearsal.

Teleconference participants include:

    Tom Whitmeyer, deputy associate administrator for Common Exploration Systems Development, NASA Headquarters in Washington
    Mike Sarafin, Artemis mission manager, NASA Headquarters
    Charlie Blackwell-Thompson, Artemis launch director, Exploration Ground Systems Program, NASA’s Kennedy Space Center in Florida

To participate by telephone, media must RSVP to NASA no later than one hour prior to the start of the event to: [email protected]

The test is designed to demonstrate the ability to conduct a full launch countdown at Kennedy’ Launch Pad 39B, including loading and draining cryogenic, or supercold, propellants into the Artemis I rocket. The dress rehearsal initially began April 1 and was previously stopped Sunday, April 3, to troubleshoot issues with two fans required to help pressurize the mobile launcher ahead of cryogenic propellant loading operations, and resumed a day later.

Through Artemis missions, NASA will land the first woman and the first person of color on the Moon, paving the way for a long-term lunar presence and serving as a steppingstone on the way to Mars.

For updates, follow along on NASA’s Artemis blog at:

https://blogs.nasa.gov/artemis/
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: gbl on 04/05/2022 07:58 pm
https://www.youtube.com/watch?v=0d8xAB9fq4w (https://www.youtube.com/watch?v=0d8xAB9fq4w)
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: ChrisC on 04/05/2022 08:29 pm
Thank you gbl!

Media telecon rundown by Chris G here:
https://mobile.twitter.com/ChrisG_NSF/status/1511433815004266496
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Targeteer on 04/05/2022 09:36 pm
"have you been able to determine why the primary and back-up valves failed to operate?"  "Yes, we sent a team to the pad yesterday and they determined a manual valve (in front of the two valves) that should have been open, was in the closed position"  Several folks are getting checklist refresher training...
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: eeergo on 04/06/2022 08:18 am
Since no scheduling updates were transcribed, here go so belated ones:

- June launch is still unaffected.
- Will attempt the WDR again after Ax-1's launch (currently set for Friday 8th).
- Aiming for a 36-hour process (not starting from the beginning of the countdown again), don't want to prolong shifts over 12 hours. This means if they start work Saturday the 9th, earliest they could reach T-0 would be Sunday 10th in the evening - more likely they'd start a bit later on Saturday to have T-0 during the day on Monday 11th. Assuming then the initially-expected closeout time, and a successful WDR at the third try, rollback would tentatively be around the 19th.
- One of two primary test objectives, and two-and-a-half secondaries out of five, have been completed. Of course, the most critical ones remain.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/06/2022 10:47 am
https://twitter.com/NASAKennedy/status/1511497497759436801?cxt=HHwWgsC-jem99fkpAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/06/2022 01:41 pm
https://twitter.com/JimFree/status/1511680884004556812?cxt=HHwWmMC4jafwyPopAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/07/2022 01:50 pm
Some mosaics I took of SLS as it awaits its WDR.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/07/2022 08:15 pm

Some satellite images from WorldView-3 where the SLS can be seen.https://twitter.com/maxar/status/1511715913615257601
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/07/2022 09:01 pm

New livestream for Artemis I Wet Dress Rehearsal.https://www.youtube.com/watch?v=TTJnTdAfG7g
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Remes on 04/07/2022 10:58 pm
The golden hour
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Remes on 04/07/2022 11:01 pm
slightly better exposure
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/08/2022 01:53 am
https://twitter.com/NASAKennedy/status/1512225148656627712
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/08/2022 01:58 am

Artemis I Wet Dress Rehearsal Status (https://blogs.nasa.gov/artemis/2022/04/07/artemis-i-wet-dress-rehearsal-status/)



In continued preparations for the Artemis I wet dress rehearsal  test, with tanking targeted for Monday, teams encountered an issue maintaining helium purge pressure on the upper stage engine after change-out of a regulator on the mobile launcher. The RL10 engine on the upper stage uses helium to purge the engine and also to activate upper stage valves during wet dress rehearsal operations. After initial troubleshooting, the team reestablished normal helium purge, and is continuing work to determine the cause of a restriction in the helium flow. Engineers will conduct troubleshooting tomorrow to confirm and characterize system performance. If needed, the mission management team will meet Sunday to disposition any adjustments in the procedures or modifications in test objectives as necessary. After the wet dress rehearsal test, SLS and Orion will return to the Vehicle Assembly Building, and engineers will conduct additional inspections of the related flight systems to further evaluate system performance. The Space Launch System rocket, the Orion spacecraft, and the supporting ground system elements remain in stable condition.


The countdown for the two-day test is currently slated to begin with call to stations beginning at 5 pm EDT on Saturday, April 9 with T-0 planned for 2:40 pm on Monday, April 11. While engineers investigate the issue, teams continue to refine the test schedule to account for insights gained during the previous runs and activities, or test objectives, that were completed earlier this week and no longer need to be included in the next test run, such as configuring ground support equipment. Pending additional analysis, NASA expects to have a forward plan tomorrow for wet dress rehearsal testing.


Check back at this blog for an update on wet dress rehearsal testing for the Artemis I mission. NASA is streaming live video of the rocket and spacecraft on the Kennedy Newsroom YouTube channel. Real-time updates will be provided on the Exploration Ground Systems Twitter account with “go” for tanking.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: eeergo on 04/08/2022 02:22 pm
Looks like the KSC webcams, no longer public, are not dead yet either!

https://twitter.com/TJ_Cooney/status/1512420885713633285 (https://twitter.com/TJ_Cooney/status/1512420885713633285)
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/08/2022 04:51 pm

Now that the Ax-1 mission has launched, NASA has the times and spaces to try the WDR again, they are still working on the problems presented this week. The schedule for this new WDR attempt will be the same as last week's original, with the same start times, procedures and T-0, if you want to see the complete WDR schedule with estimated dates at different times to program your schedule you can check the following link: https://forum.nasaspaceflight.com/index.php?topic=56107.msg2356158#msg2356158
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: su27k on 04/09/2022 04:11 am
https://twitter.com/NASASpaceflight/status/1512575981692805124

Quote
SLS needs to return to Call To Stations on Saturday to begin the countdown for Monday.

However, it's becoming possible that's been postponed as the Mission Management Team (MMT) discusses troubleshooting options that will either set a new WDR timeline or roll back to the VAB.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/09/2022 04:16 am

The WDR would no longer be scheduled for this weekend, it would be attempted this Tuesday with a T-0 on Thursday.https://twitter.com/spaceflightnow/status/1512625708526444545 (https://twitter.com/spaceflightnow/status/1512625708526444545?s=21&t=dOWi4lX4ba2KdVOMWDp2fQ)
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: [email protected] on 04/09/2022 11:58 am
And now additional three days (T-0 Thrusday)
https://twitter.com/SpaceflightNow/status/1512755411987976192?t=efrvS6Uf-xyNkOgB7yFaZQ&s=19
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/09/2022 12:23 pm

Artemis I Wet Dress Rehearsal Update  (https://blogs.nasa.gov/artemis/2022/04/09/artemis-i-wet-dress-rehearsal-update/)



NASA is planning to proceed with a modified wet dress rehearsal, primarily focused on tanking the core stage, and minimal propellant operations on the interim cryogenic propulsion stage (ICPS) with the ground systems at Kennedy. Due to the changes in loading procedures required for the modified test, wet dress rehearsal testing is slated to resume with call to stations on Tuesday, April 12 and tanking on Thursday, April 14. Wet dress rehearsal is an opportunity to refine the countdown procedures and validate critical models and software interfaces. The modified test will enable engineers to achieve the test objectives critical to launch success. 


Engineers have identified a helium check valve that is not functioning as expected, requiring these changes to ensure safety of the flight hardware. Helium is used for several different operations, including purging the engine, or clearing the lines, prior to loading propellants during tanking, as well as draining propellant. A check valve is a type of valve that allows liquid or gas to flow in a particular direction and prevents backflow. The helium check valve is about three inches long and prevents the helium from flowing back out of the rocket.


Following the modified test, the Space Launch System rocket and Orion spacecraft will return to the Vehicle Assembly Building (VAB) where engineers will evaluate the valve and replace if needed. Teams are confident in the ability to replace the valve once back in the VAB.  


NASA will host a teleconference to discuss details on Monday, April 11. Check back at this blog for an update on the countdown timeline prior to the modified wet dress rehearsal testing for the Artemis I mission. NASA is streaming live video of the rocket and spacecraft on the Kennedy Newsroom YouTube channel.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/09/2022 12:25 pm
https://twitter.com/cbs_spacenews/status/1512766039926390787?cxt=HHwWhoCy4distv4pAAAA
https://twitter.com/cbs_spacenews/status/1512766765083893764?cxt=HHwWiIC9zfPWtv4pAAAA
https://twitter.com/cbs_spacenews/status/1512768111711301634?cxt=HHwWhMC54aSlt_4pAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/09/2022 01:47 pm
https://twitter.com/SpaceflightNow/status/1512788969645293570?cxt=HHwWhICyvbDjwP4pAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/09/2022 02:06 pm
https://twitter.com/SpaceflightNow/status/1512789609113075721?cxt=HHwWkoCy8cyIwf4pAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Targeteer on 04/11/2022 02:30 pm
April 11, 2022
MEDIA ADVISORY  M22-047
NASA to Discuss Plans Today for Artemis Moon Mission Modified Test

NASA will hold a media teleconference at 4 p.m. EDT today, Monday, April 11, to provide an update on the final major test of the agency’s mega Moon rocket and spacecraft on the launch pad at the agency’s Kennedy Space Center in Florida ahead of the uncrewed Artemis I lunar mission.

The teleconference will stream live on the agency’s website.

NASA is planning to proceed with a modified wet dress rehearsal test focused on using the ground systems at Kennedy to load propellant into the Space Launch System (SLS) rocket’s core stage tanks, with minimal propellant operations on the upper stage. In addition to loading propellant, the wet dress rehearsal is an opportunity to refine countdown procedures and validate critical models and software interfaces. The team achieved many of the wet dress rehearsal objectives during the two prior tests, and the modified test will enable engineers to achieve the remaining test objectives critical to launch success. 

Teleconference participants include:

    Tom Whitmeyer, deputy associate administrator for common exploration systems development, NASA Headquarters in Washington
    Charlie Blackwell-Thompson, Artemis launch director, NASA Exploration Ground Systems program, Kennedy
    John Blevins, SLS chief engineer, NASA Marshall Space Flight Center in Huntsville, Alabama
    Mike Sarafin, Artemis mission manager, NASA Headquarters

To participate by telephone, media must RSVP to NASA no later than one hour prior to the start of the event to: [email protected]

Following the previous test run, engineers identified an issue with a helium check valve that was not functioning as expected, requiring changes to the test to ensure safety of the flight hardware. Due to the time needed to adjust loading procedures, testing is scheduled to resume with call to stations on Tuesday, April 12 and tanking on Thursday, April 14.

Through Artemis missions, NASA will land the first woman and the first person of color on the Moon, paving the way for a long-term lunar presence and serving as a steppingstone to send astronauts to Mars.

For updates, follow along on NASA’s Artemis blog at:

https://blogs.nasa.gov/artemis/
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: yg1968 on 04/11/2022 10:04 pm
Media Briefing: Artemis I Wet Dress Rehearsal Status Update

https://youtu.be/aOBQcNDclg8

Source: twitter.com/genejm29/status/1513607785845514245
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: sdsds on 04/12/2022 12:34 am
Some notes on their verbal description of the problem, taken from the media teleconference.

At 14:40 or thereabouts, Charlie Blackwell-Thomson (Launch Director) says:
During post-ops from wet dress run number 2 some helium leakage was identified from a helium supply inlet fitting down in the ML base. Control regulator that ultimately provides pressure to the upper stage COPVs. Team went in to do troubleshooting. Replaced the leaking component. Reduced COPV pressure as part of the troubleshooting. When part was repaired, they didn't see the expected pressure on the upper stage COPVs.. Friday determined the issue was on the flight side of the interface.

John Blevins, MSFC, says:
Vehicle in great condition except this one condition. Modified WDR really will cover majority of what we're interested in, even APUs on boosters. Much more than just a tanking test. During ICPS testing after ground system component switched out we detected an inoperative check valve, we did reverse flow check, which failed. The part is 1-1/8th inch diameter, 3 inches long; connects two half inch lines. It's a high reliability part so this is an unexpected outcome. Don't have great access to it on the pad; easy access when back in the VAB. Mounted to a structural board inside the ICPS. Hesitate to speculate why it isn't operating right because in a week and half we'll know. Easy to find out when it occurred. PSET (program specific engineering testing). EGS/SLS partnership <?> So it happened when we re-pressurized the system after the other component was changed.

Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: eeergo on 04/12/2022 08:43 am
A few other salient points to build upon sdsds' summary above:

- Helium valve is the only vehicle-side flight hardware issue so far.
- 3 commanding functions during coundown on ICPS which won't be completed (out of about 80). Two of 25 "critical events" are exclusively ICPS, so 23 will be tested.
- No concerns regarding secondary payloads (i.e. charge levels which can be topped up in VAB after rollback).
- T0 planned for 2.40 pm EDT on Thursday.
- WDR-to-rollback: around 10 days.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: kdhilliard on 04/12/2022 02:17 pm
Also from Monday's media briefing:
- The ICPS Helium COPV fill path runs up the Mobile Launcher, through the ML-side Quick Disconnect valve, through the ICPS-side QD valve, then through the faulty check valve and on to the 8 He COPVs.
- The check valve's purpose is to prevent leakage in case the ICPS-side QD valve fails to seal at launch.
- The check valve is still passing He in the forward direction (it is not failed closed), but it is not sealing to prevent reverse flow as it should.
- It was implied, but not explicitly stated, that the full WDR could be carried out despite the faulty check valve were it not for safety concerns.  Unfortunately the reporters didn't press them on that, but I assume the concern is that if a leak developed in the ML He plumbing, then they'd loose COPV pressure.  He from those COPVs is used to condition the ICPS's RL-10 engine and for ullage fill during detanking.
- The modified WDR will include ICPS chill-down and thus will test the QDs for leaks.
- No decision on future plans (such as whether an additional, full WDR will be required after the ICPS is repaired) will be made until the modified WDR is conducted and all the data are examined.  They hinted that if everything else went well and the data they did get from ICPS (temperature readings, etc.) validated their models, then the next rollout would be for a launch attempt, but that this would require the vehicle passing a Flight Readiness Review with appropriate Flight Rationale.
- If they did want to conduct a future fill test of the ICPS, it would require the Core Stage to be filled as well.  The ICPS cannot be filled on top an empty Core Stage.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: eeergo on 04/12/2022 02:32 pm
Is there a scheduled time for today's call to stations? I might have missed it in the audio...
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Khadgars on 04/12/2022 02:33 pm
A few other salient points to build upon sdsds' summary above:

- Helium valve is the only vehicle-side flight hardware issue so far.
- 3 commanding functions during coundown on ICPS which won't be completed (out of about 80). Two of 25 "critical events" are exclusively ICPS, so 23 will be tested.
- No concerns regarding secondary payloads (i.e. charge levels which can be topped up in VAB after rollback).
- T0 planned for 2.40 pm EDT on Thursday.
- WDR-to-rollback: around 10 days.

Question on the bold above.  That is stating once WDR is complete, it will be 10 days before they roll back to VAB?
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: woods170 on 04/12/2022 02:38 pm
A few other salient points to build upon sdsds' summary above:

- Helium valve is the only vehicle-side flight hardware issue so far.
- 3 commanding functions during coundown on ICPS which won't be completed (out of about 80). Two of 25 "critical events" are exclusively ICPS, so 23 will be tested.
- No concerns regarding secondary payloads (i.e. charge levels which can be topped up in VAB after rollback).
- T0 planned for 2.40 pm EDT on Thursday.
- WDR-to-rollback: around 10 days.

Question on the bold above.  That is stating once WDR is complete, it will be 10 days before they roll back to VAB?
Yes.

For the same reason WDR did not start immediately after rollout. There is a lot of stuff that needs to be safed and powered-down on SLS and the ML and also a lot of pad systems that need to be unhooked from the ML.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: eeergo on 04/12/2022 02:52 pm
A few other salient points to build upon sdsds' summary above:

- Helium valve is the only vehicle-side flight hardware issue so far.
- 3 commanding functions during coundown on ICPS which won't be completed (out of about 80). Two of 25 "critical events" are exclusively ICPS, so 23 will be tested.
- No concerns regarding secondary payloads (i.e. charge levels which can be topped up in VAB after rollback).
- T0 planned for 2.40 pm EDT on Thursday.
- WDR-to-rollback: around 10 days.

Question on the bold above.  That is stating once WDR is complete, it will be 10 days before they roll back to VAB?

Yes, the main things mentioned were: Post WDR post-ops: 1-2 days. Then , de-servicing of SRBs. Then, roll preparations. About 10 days total.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: kdhilliard on 04/12/2022 03:09 pm
Is there a scheduled time for today's call to stations? I might have missed it in the audio...

https://youtube.com/watch?v=aOBQcNDclg8&t=9m40s
Quote from: Tiffany Fairley, NASA Office of Communication
Due to the time needed to adjust loading procedures, testing is scheduled to resume with Call To Stations at 5 PM Eastern Time Tuesday, April 12th, and tanking starting Thursday, April 14th.  The T-0 will remain at 2:40 PM Eastern on the 14th.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/12/2022 09:49 pm

Artemis I Update: Countdown is Underway for Wet Dress Rehearsal (https://blogs.nasa.gov/artemis/2022/04/12/artemis-i-update-countdown-is-underway-for-wet-dress-rehearsal-2/)

At approximately 5 p.m. EDT today, the launch team arrived at their stations inside the Launch Control Center at NASA’s Kennedy Space Center in Florida. The countdown will begin 30 minutes later at 5:30 p.m. or L-45 hours, 10 minutes before the initial target T-0 for the wet dress rehearsal test for NASA’s Artemis I mission. Teams are proceeding with a modified test, primarily focused on tanking the core stage and minimal propellant operations on the interim cryogenic propulsion stage (ICPS) with the ground systems at Kennedy. Tanking operations are scheduled to occur on Thursday, April 14.


Meteorologists with the U.S. Space Force 45th Space Wing predict favorable weather for propellant loading operations.  Weather constraints stipulate there must be less than a 20% chance lightning within 5 nautical miles of pad during the first hour of tanking. Winds also must not be above 37.5 knots and the temperature cannot be below 41 degrees Fahrenheit.


Overnight, teams will power up Orion and the Space Launch System core stage, charge Orion’s flight batteries to 100%, and prepare the four RS-25 engines, which will not be lit during the test.


During the test, the timing for some events on account of several planned operational demonstrations tied to specific capabilities and test objectives may differ from the day of launch countdown. These demonstrations include tests on the cryogenic systems and an approximately three-minute hold inside the terminal count, which would not normally occur on launch day. If needed, the test team may also hold as necessary to verify conditions before resuming the countdown, or use the test window or extend beyond it, if consumables and resources allow them to complete test objectives.


In addition to updates on this blog, NASA will provide live updates on the Exploration Ground Systems Twitter account. NASA is also streaming live video of the rocket and spacecraft at Launch Pad 39B on the Kennedy Newsroom YouTube channel. Activity at the launch pad will likely not be visible during the majority of the countdown, but some venting may be seen during tanking on April 14.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/13/2022 05:24 pm
Artemis I Update: Preparations Continue, Rocket’s Core Stage Powered Up (https://blogs.nasa.gov/artemis/2022/04/13/artemis-i-update-preparations-continue-rockets-core-stage-powered-up/)

Overnight, launch controllers powered up the Orion spacecraft and the Space Launch System rocket’s core stage. Communications links between Orion and the Mission Control Center at Johnson Space Center in Houston were verified, and preparations of the four RS-25 engines, which will not be lit during the wet dress rehearsal, continued. Over the next several hours, controllers will charge Orion’s batteries and conduct final preparations and closeout activities for the umbilicals.


The umbilicals provide power, communications, coolant, and fuel to different parts of the rocket. Additional accessories provide access and stabilize the rocket and spacecraft. During launch, each umbilical releases from its connection point, allowing the rocket and spacecraft to lift off safely from the launch pad.


The mission management team is scheduled to meet at 11 a.m. EDT to review the status of operations. The next update will be posted after the conclusion of the meeting.


NASA will provide live updates on the Exploration Ground Systems Twitter account. NASA is also streaming live video of the rocket and spacecraft at Launch Pad 39B on the Kennedy Newsroom YouTube channel.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/13/2022 05:24 pm
Artemis I Update: Weather Still Favorable for Artemis I Wet Dress Rehearsal (https://blogs.nasa.gov/artemis/2022/04/13/artemis-i-update-weather-still-favorable-for-artemis-i-wet-dress-rehearsal/)

The mission management team for Artemis I met this morning to review the status of operations and continues to press ahead toward terminal countdown for the wet dress rehearsal test. Meteorologists with the U.S. Space Force Space Launch Delta 45 currently predict favorable weather conditions for tanking on April 14. There is currently a 5% chance of lightning within five nautical miles of the launch pad when tanking begins. Weather constraints stipulate there must be less than a 20% chance lightning within 5 nautical miles of pad during the first hour of tanking. Winds must not be above 37.5 knots and the temperature cannot be below 41 degrees Fahrenheit.


Later today teams will perform a pre-launch walkdown of the rocket and ensure the Space Launch System’s core stage is prepared for the upcoming loading operations.


NASA will provide live updates on the Exploration Ground Systems Twitter account. NASA is also streaming live video of the rocket and spacecraft at Launch Pad 39B on the Kennedy Newsroom YouTube channel.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 11:17 am
https://twitter.com/NASAGroundSys/status/1514545973762170881?cxt=HHwWgoC9ob3i34QqAAAA
https://twitter.com/cbs_spacenews/status/1514553409659195392?cxt=HHwWgMC-gaeT44QqAAAA
https://twitter.com/cbs_spacenews/status/1514553768553111554?cxt=HHwWhICz_Zio44QqAAAA
https://twitter.com/cbs_spacenews/status/1514554107943690246?cxt=HHwWjIC90fm744QqAAAA
https://twitter.com/cbs_spacenews/status/1514555125129482242?cxt=HHwWhMC4oZT344QqAAAA
https://twitter.com/cbs_spacenews/status/1514559568675811334?cxt=HHwWjMC5oef55YQqAAAA
https://twitter.com/cbs_spacenews/status/1514560824051916800?cxt=HHwWgICzxfDC5oQqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 11:21 am
https://twitter.com/JimFree/status/1514407824444567554?cxt=HHwWhMC50ZD5oIQqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 11:23 am
https://twitter.com/NASAGroundSys/status/1514557321510334464?cxt=HHwWgMC5yYD35IQqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 11:33 am
https://twitter.com/cbs_spacenews/status/1514567172978266122?cxt=HHwWlMCy3be06YQqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 11:40 am
https://twitter.com/NASAGroundSys/status/1514566900822560773?cxt=HHwWisC-gcyk6YQqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/14/2022 12:14 pm
Here we go!

https://twitter.com/NASAGroundSys/status/1514577303514275844
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/14/2022 12:49 pm
And we're counting!

Credit: Spaceflight now

https://www.youtube.com/watch?v=ln2Tlu5CRwc
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: RocketLover0119 on 04/14/2022 12:51 pm
https://twitter.com/nasagroundsys/status/1514586731034644483?s=21&t=cqHRAztCplUEg2qWMA07zQ
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 01:22 pm
https://twitter.com/cbs_spacenews/status/1514587580494458882?cxt=HHwWhMC5yafY8oQqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 01:24 pm
https://twitter.com/NASA_SLS/status/1514592405978292236?cxt=HHwWmIC5nZjx9IQqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Orbiter on 04/14/2022 01:45 pm
A similar issue popped up on April 4th.

https://twitter.com/NASAGroundSys/status/1514600094804242434
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 02:20 pm
https://twitter.com/SpaceflightNow/status/1514606133121466376?cxt=HHwWkICqtZuQ-4QqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 02:27 pm
https://twitter.com/NASAGroundSys/status/1514609605044670468?cxt=HHwWiMCooafa_IQqAAAA
https://twitter.com/cbs_spacenews/status/1514611154928091139?cxt=HHwWhoCq5cK0_YQqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 02:54 pm
https://twitter.com/waynehale/status/1514612995556470787?cxt=HHwWhsCrxdSf_oQqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 03:06 pm
https://twitter.com/NASAGroundSys/status/1514619316301299718?cxt=HHwWjICs4cmPgYUqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 03:27 pm
https://twitter.com/NASAGroundSys/status/1514624546401304588?cxt=HHwWmICyhYHAg4UqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 03:41 pm
https://twitter.com/NASAGroundSys/status/1514628957752156165?cxt=HHwWioCzleTAhYUqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 04:00 pm
"Core Stage liquid oxygen (LOX) slow fill operations are underway" !! 8)

https://twitter.com/NASAGroundSys/status/1514633485289508873?cxt=HHwWksC--ajIh4UqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 04:05 pm
https://twitter.com/NASAGroundSys/status/1514635881696710656?cxt=HHwWgMC-yefTiIUqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 04:21 pm
https://twitter.com/NASAGroundSys/status/1514639564333367297?cxt=HHwWgoC-rZWqioUqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 04:25 pm
https://twitter.com/NASAGroundSys/status/1514640722988785664?cxt=HHwWgICzgc7tioUqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 04:31 pm
https://twitter.com/cbs_spacenews/status/1514640342263418887?cxt=HHwWjsCysbnXioUqAAAA
https://twitter.com/SpaceflightNow/status/1514642899778088965?cxt=HHwWisC5rajsi4UqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 04:38 pm
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 05:10 pm
https://twitter.com/cbs_spacenews/status/1514649459774402569?cxt=HHwWksC5kZTqjoUqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 05:10 pm
https://twitter.com/NASAGroundSys/status/1514652284692619268?cxt=HHwWiICztcuOkIUqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: 2024MoonShot on 04/14/2022 05:24 pm
You can see what I think is LOX venting just below the LVSA.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 05:28 pm
https://twitter.com/SpaceflightNow/status/1514656360138424321?cxt=HHwWgoCy7ef7kYUqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 05:30 pm
You can see what I think is LOX venting just below the LVSA.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/14/2022 05:32 pm
https://twitter.com/NASAGroundSys/status/1514657741775818757
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/14/2022 05:43 pm
https://twitter.com/NASAGroundSys/status/1514660661791444994
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: cplchanb on 04/14/2022 05:46 pm
That's good! Quick fix this time!
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/14/2022 06:41 pm
https://twitter.com/NASAGroundSys/status/1514675191292571652
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 07:05 pm
https://twitter.com/cbs_spacenews/status/1514677693031329794?cxt=HHwWhMC5pcbVm4UqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 07:15 pm
https://twitter.com/NASAGroundSys/status/1514683430956584968?cxt=HHwWkMCylcWjnoUqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 07:22 pm
Clock hold à H-10:00.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 07:25 pm
" Tail Service Mast Umbilical".

https://www.nasa.gov/sites/default/files/atoms/files/fs-2018-02-250-ksc-ml_umbilical_fact_sheet.pdf
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 07:34 pm
https://twitter.com/cbs_spacenews/status/1514687907621179394?cxt=HHwWhMC49Y6ooIUqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 07:39 pm
https://twitter.com/NASAGroundSys/status/1514689488727027717?cxt=HHwWisC9iZOEoYUqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 07:41 pm
https://twitter.com/SpaceflightNow/status/1514689387304570882?cxt=HHwWhMC-tZ_-oIUqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/14/2022 08:05 pm
https://twitter.com/NASAGroundSys/status/1514695705759211523
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: 2024MoonShot on 04/14/2022 08:51 pm
Looks like they'll have to try again after figuring out where the leak is.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: hektor on 04/14/2022 09:14 pm
https://twitter.com/NASAGroundSys/status/1514717100358647809?s=20 (https://twitter.com/NASAGroundSys/status/1514717100358647809?s=20)
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: VSECOTSPE on 04/14/2022 10:25 pm

Hydrogen umbilical leak:

Quote
Controllers, though, stopped liquid hydrogen loading again after detecting a leak in an umbilical line connecting the core stage to the tail service mast on the launch platform. At that point the core stage’s liquid oxygen tank was 49% full but the liquid hydrogen tank only 5% full.

NASA effectively scrubbed the test around 4 p.m. Eastern when it announced it would not continue filling the core stage tanks and instead focus on chilling down propellant lines in the SLS’s upper stage. NASA managers previously decided not to fill the tanks on that upper stage in this test because of a faulty helium check valve in the stage.

It was not immediately clear when NASA would try again to complete the wet dress rehearsal of the SLS. NASA said only it would not proceed with the terminal stage of the countdown and instead “will assess next steps after today’s operations.”

https://spacenews.com/nasa-halts-third-attempt-at-sls-practice-countdown/

Hydrogen leaks dogged STS throughout the program and caused a number of launch delays, sometimes long ones:

2010
https://www.nytimes.com/2010/11/06/us/06shuttle.html

2009
https://www.csmonitor.com/USA/2009/0618/p02s01-usgn.html

2002
https://www.nytimes.com/2002/04/05/us/fuel-leak-delays-launching-of-space-shuttle.html

1995
https://www.latimes.com/archives/la-xpm-1995-09-29-mn-51341-story.html

1990
https://www.latimes.com/archives/la-xpm-1990-09-06-mn-1019-story.html

1988
https://www.upi.com/Archives/1988/07/28/Fueling-of-the-shuttle-Discovery-in-a-twice-delayed-countdown/8022586065600/

1983
https://www.nytimes.com/1983/01/26/us/hydrogen-leak-forces-second-space-shuttle-delay.html

1990 was especially bad:

https://www.americaspace.com/2015/08/01/summer-of-discontent-25-years-since-the-shuttle-hydrogen-leaks-part-1/

https://www.americaspace.com/2015/08/02/summer-of-discontent-25-years-since-the-shuttle-hydrogen-leaks-part-2/

FWIW...
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/14/2022 10:53 pm
https://twitter.com/SpaceflightNow/status/1514737141745692672?cxt=HHwWgMC93fXZtoUqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/14/2022 10:56 pm

Artemis I WDR Update: Third Test Attempt Concluded (https://blogs.nasa.gov/artemis/2022/04/14/artemis-i-wdr-update-third-test-attempt-concluded/)

Teams concluded today’s wet dress rehearsal test at approximately 5:10 p.m. EDT after observing a liquid hydrogen (LH2) leak on the tail service mast umbilical, which is located at the base of the mobile launcher and connects to the rocket’s core stage. The leak was discovered during liquid hydrogen loading operations and prevented the team from completing the test.


Before ending the test, teams also met test objectives for the interim cryogenic propulsion stage by chilling down the lines used to load propellant into the upper stage. They did not flow any propellant to the stage because of an issue with a helium check valve identified several days ago.


When teams paused propellant loading, the rocket’s core stage liquid oxygen tank was about 49% filled and the liquid hydrogen tank had been loaded to about 5% capacity prior to the hydrogen leak.


Teams are now working to drain propellant from the rocket. They will inspect the umbilical connection, review data, and establish a go-forward plan to address the hydrogen leak.


NASA plans to host a media teleconference April 15 to provide updates on troubleshooting and next steps for the wet dress rehearsal test.

Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Targeteer on 04/15/2022 02:59 am
April 14, 2022
MEDIA ADVISORY M22-054
NASA to Discuss Initial Findings from Artemis Moon Mission Modified Test

NASA will hold a media teleconference at 3 p.m. EDT on Friday, April 15, to discuss the wet dress rehearsal test of the agency’s Space Launch System (SLS) rocket and Orion spacecraft at Launch Complex 39B at the agency’s Kennedy Space Center in Florida ahead of the uncrewed Artemis I lunar mission.

The teleconference will stream live on the agency’s website.

Teleconference participants include:

    Charlie Blackwell-Thompson, Artemis launch director, NASA Exploration Ground Systems program, Kennedy
    Mike Sarafin, Artemis mission manager, NASA Headquarters

To participate by telephone, media must RSVP no later than two hours prior to the start of the event to: [email protected] 

NASA’s third test attempt began April 12 with a modified test procedure and concluded April 14. The test focused on using the ground systems at the Kennedy spaceport to load propellant into the Space Launch System (SLS) rocket’s core stage tanks, with minimal propellant operations on the upper stage.

Engineers encountered a liquid hydrogen leak on the tail service mast umbilical that prevented the team from completing the test. Before ending the test, teams were able to collect additional data by chilling down the lines used to load propellant into the upper stage. The rocket remains in a safe configuration as teams asses next steps.

Through Artemis missions, NASA will land the first woman and the first person of color on the Moon, paving the way for a long-term lunar presence and serving as a steppingstone to send astronauts to Mars.

For updates, follow along on NASA’s Artemis blog at:

https://blogs.nasa.gov/artemis
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: zubenelgenubi on 04/15/2022 03:07 am
Moderator:
I split/merged 20? posts to the Artemis I discussion thread.  They were less directly related to the business at hand.

The WDR should now be easier to follow in this thread.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/15/2022 04:45 pm
https://twitter.com/JimFree/status/1514980625563926534?cxt=HHwWjICyxcW2pYYqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: zubenelgenubi on 04/15/2022 08:14 pm
Quote
Today at 3pm ET, we are sharing details about yesterday’s modified wet dress rehearsal attempt for #Artemis I, where the NASAGroundSys team worked on refining the countdown procedures as they practiced tanking NASA_SLS’s core stage. Listen in at http://nasa.gov/live.

Edit: Briefing is over; I found the YT link after the fact.

https://m.youtube.com/watch?v=tz5B0qCH5W8
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: AnalogMan on 04/15/2022 08:23 pm
Quote
Today at 3pm ET, we are sharing details about yesterday’s modified wet dress rehearsal attempt for #Artemis I, where the NASAGroundSys team worked on refining the countdown procedures as they practiced tanking NASA_SLS’s core stage. Listen in at http://nasa.gov/live (http://nasa.gov/live).
How did the briefing go?  I found no link a few minutes ago--already over?

Link:

https://www.youtube.com/watch?v=tz5B0qCH5W8 (https://www.youtube.com/watch?v=tz5B0qCH5W8)

Teleconference starts at 8mins 45 seconds
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Khadgars on 04/15/2022 08:50 pm
Next opportunity for WDR 4 would be Thursday next week.  Will determine feasibility once they find root cause of the LH2 leak.  Should have access to ML today for troubleshooting.

When asked they said this WDR is within family of STS and even Saturn V.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/15/2022 10:34 pm
https://twitter.com/JimFree/status/1515057117752926217?cxt=HHwWkoC54fyayIYqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/15/2022 10:36 pm
https://twitter.com/EmreKelly/status/1515045472137850882?cxt=HHwWhMC5lY71woYqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: oldAtlas_Eguy on 04/16/2022 01:38 am
In the Crew 4 FRR it was stated that Crew 4 has priority over Artemis I WDR. Note as well that the Dry Dress rehearsal with crew on the pad is set for Apr 20. Followed afterward that afternoon to night with the Hot Fire test. On April 21 if the range is not busy with some remaining Crew 4 activities then there is a scheduled Starlink launch from LC-40. Then if that is scrubbed it would leapfrog to likely sometime after Crew 4 which at this time is scheduled for Apr 23, weather and Hot Fire results pending. Crew 4 also has launch availability on Apr 24 and 25th.

If a WDR would not be done until Apr 21 then it will be delayed to after Crew 4 at the earliest being likely Apr 26 and could end even being in May. ISS Beta cutout starts May 10. So Crew 3 has to leave before then else it has to stick around until after May 20th.

Here is hopping for clear weather for next week.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: yg1968 on 04/16/2022 03:56 pm
https://twitter.com/johnkrausphotos/status/1515292242570788864
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/17/2022 01:39 am
NASA to Discuss Status of Artemis I Moon Mission (https://www.nasa.gov/press-release/nasa-to-discuss-status-of-artemis-i-moon-mission)

NASA will hold a media teleconference at 3 p.m. EDT on Monday, April 18, to discuss the status of the next wet dress rehearsal test of the agency’s Space Launch System (SLS) rocket and Orion spacecraft at Launch Complex 39B at the agency’s Kennedy Space Center in Florida ahead of the uncrewed Artemis I lunar mission.


Due to upgrades required at an off-site supplier of gaseous nitrogen used for the test, NASA will take advantage of the opportunity to roll SLS and Orion back to the Vehicle Assembly Building to replace a faulty upper stage check valve and a small leak on the tail service mast umbilical. During that time, the agency also will review schedules and options to demonstrate propellant loading operations ahead of launch.


The teleconference will stream live on the agency’s website.


Teleconference participants include:


- Tom Whitmeyer, deputy associate administrator for common exploration systems development, NASA Headquarters in Washington
- Charlie Blackwell-Thompson, Artemis launch director, NASA Exploration Ground Systems program, Kennedy
- Mike Sarafin, Artemis mission manager, NASA Headquarters
To participate by telephone, media must RSVP no later than two hours prior to the start of the event to: [email protected] 


Through Artemis missions, NASA will land the first woman and the first person of color on the Moon, paving the way for a long-term lunar presence and serving as a steppingstone to send astronauts to Mars.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/17/2022 01:40 am
https://twitter.com/NASA/status/1515499699721097225
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: friendly3 on 04/17/2022 01:56 am
https://twitter.com/SciGuySpace/status/1515500328380162053?s=20&t=bFDNQ6YNsoGkfkCqxfLpZg
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: gbl on 04/18/2022 06:14 pm
Artemis I Status Update - Media Teleconference 3pm EDT Monday, April 18, 2022
https://youtu.be/ceib3c8XBdw (https://youtu.be/ceib3c8XBdw)
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/18/2022 07:28 pm
https://twitter.com/SpaceflightNow/status/1516132822213349377?cxt=HHwWgsCyxZuxsYoqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/18/2022 07:49 pm
https://twitter.com/cbs_spacenews/status/1516140949986058250?cxt=HHwWlIC9laiKtYoqAAAA
https://twitter.com/cbs_spacenews/status/1516141013273829379?cxt=HHwWhoCz2f-NtYoqAAAA
https://twitter.com/cbs_spacenews/status/1516141409023238150?cxt=HHwWjIC5oYSltYoqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: zubenelgenubi on 04/22/2022 06:07 pm
Moderator:
I split/merged 12 recent posts to the Artemis I discussion thread.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/23/2022 01:08 am
NASA’s Artemis I Rocket Readying for Return to Vehicle Assembly Building (https://blogs.nasa.gov/artemis/2022/04/22/nasas-artemis-i-rocket-readying-for-return-to-vehicle-assembly-building/)

Teams at NASA’s Kennedy Space Center in Florida are preparing the Space Launch System (SLS) rocket and Orion spacecraft for their return to the Vehicle Assembly Building (VAB) early next week. As work continues at the launch pad throughout the weekend, we will also continue working closely with our commercial crew partners to confirm a date and time. The transition is underway to move from the testing configuration to the roll back formation needed to return to the VAB. This process includes offloading hydrazine from the twin solid rocket boosters and disconnecting the rocket and spacecraft from the ground systems infrastructure at the launch pad. The core stage propellant was drained shortly after completing the last test attempt. The rocket and spacecraft remain in a safe configuration and will soon be placed atop the crawler-transporter for the 4-mile trek to the VAB.
Inside the VAB, engineers will repair a faulty helium check valve and a hydrogen leak on the mobile launcher while the supplier for the gaseous nitrogen makes upgrades to their pipeline configuration to support Artemis I testing and launch.
While most objectives associated with the wet dress rehearsal were met during recent testing, teams plan to return to the launch pad when repairs and checkouts in the VAB are complete for the next full wet dress test attempt. Following completion of the test, SLS and Orion will return to the VAB for the remaining checkouts before rolling back out to the pad for launch.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: zubenelgenubi on 04/25/2022 10:01 am
SFN, NASA readies SLS moon rocket for return to Vehicle Assembly Building (https://spaceflightnow.com/2022/04/24/nasa-sls-artemis-1-return-to-vab), dated April 24
Quote
Ground teams moved a diesel-powered crawler-transporter underneath the Space Launch System moon rocket Sunday [Apr 24] on pad 39B at NASA’s Kennedy Space Center, preparing the towering launcher for a return to the Vehicle Assembly Building for repairs.

The rollback to the Vehicle Assembly Building is set to begin as soon as Monday afternoon, giving the SLS team plenty of time to bring the rocket back to the hangar before the scheduled launch of a SpaceX crew mission to the International Space Station early Wednesday.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: jacqmans on 04/25/2022 02:53 pm
https://twitter.com/SciGuySpace/status/1518602525166948355?s=20&t=3x62J1g1VNFTxJWzkmIoxw
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: jacqmans on 04/25/2022 02:53 pm
https://twitter.com/NASAKennedy/status/1518595637582909443?s=20&t=3x62J1g1VNFTxJWzkmIoxw
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: oldAtlas_Eguy on 04/25/2022 05:38 pm
https://twitter.com/SciGuySpace/status/1518602525166948355?s=20&t=3x62J1g1VNFTxJWzkmIoxw
The NET Aug for launch is a realization with the decision to do another normal WDR process of rollout and then rollback. Most of that is has multiple reasons for that decisions and that is that and that is that the hybrid process of rollout to do a WDR then followed by a launch is unlikely to have enough certification time for the destruct to be able to do a launch after the WDR. The other is that procedures will have to be closely edited for the WDR to do a WDR with an active destruct package. In the long run the result is that no time would be saved. So a normal WDR followed by the rollback to activate the destruct then rollout to launch. Takes a minimum of 60 days. So the current question is that how long before the rollout to do the WDR. At the moment would be at best 30 days from now or NET 25 May. Then + 60 days is 25 July for rollout to launch with first launch possibility at 12 days latter of NET 5 Aug.

A basic note is that just to be able to do all the additional rolls takes ~50 days. This is because it takes 10 days for SLS/Orion stack to go from a static location state to a rolling state as well as the other way. With 5 extra state changes to do rolls that is 50 days. Hopefully after doing so many of these state change actions for rolling they get a little faster at it.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/25/2022 06:43 pm
https://twitter.com/NASAGroundSys/status/1518606864132497409?cxt=HHwWgoCzobS5lpMqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: zubenelgenubi on 04/25/2022 06:59 pm
Quote from: Eric Berger tweet
NASA plans to roll the SLS rocket back to the Vehicle Assembly Building on Monday night. While NASA is not publicly discussing a launch schedule, two sources say the Artemis I launch is now NET August.
Psyche will launch on a Falcon Heavy from LC-39A; the launch window opens August 1.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: kdhilliard on 04/25/2022 10:38 pm
Psyche will launch on a Falcon Heavy from LC-39A; the launch window opens August 1.

Interesting.  The late July / early August Artemis I window is July 26 - August 9.

Do we know when the next window is?
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/25/2022 11:12 pm
https://twitter.com/NASAGroundSys/status/1518728532846948353
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Khadgars on 04/26/2022 12:05 am
https://twitter.com/NASAGroundSys/status/1518741746716393476
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/26/2022 01:25 am
The SLS rocket has left Launch Complex 39B and is headed for the VAB in the morning.
https://www.youtube.com/watch?v=DwmuRyfsA7s
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/26/2022 01:44 pm

Artemis I Moon Rocket Arrives at Vehicle Assembly Building (https://blogs.nasa.gov/artemis/2022/04/26/artemis-i-moon-rocket-arrives-at-vehicle-assembly-building/)

At approximately 6 a.m. ET Tuesday, NASA’s Space Launch System (SLS) rocket and Orion spacecraft for the Artemis I mission arrived at the Vehicle Assembly Building (VAB) at Kennedy Space Center after a 10-hour journey from launch pad 39B that began at 7:54 p.m. ET Monday, April 25.


Over the next several days, the team will extend the work platforms to allow access to SLS and Orion. In the coming weeks, teams will work on replacing a faulty upper stage check valve and a small leak within the tail service mast umbilical ground plate housing, and perform additional checkouts before returning to the launch pad for the next wet dress rehearsal attempt.   
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/26/2022 05:26 pm

If you want to be updated on the latest information from the SLS after the rocket's arrival at the VAB, check out the following article from NASASpaceFlight where you will find NASA's action plan to solve the problems and how the current situation is for the Artemis I launch.


Article: Artemis 1 vehicle heads back to VAB while NASA discusses what to do next (https://www.nasaspaceflight.com/2022/04/artemis-1-vab-nasa-discusses-what-next/)
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 04/26/2022 07:06 pm
https://twitter.com/SpaceflightNow/status/1519027766708088833?cxt=HHwWgsC56ZTt1ZQqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 04/27/2022 02:40 am
https://twitter.com/TaylorHose/status/1519102438111858688
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Khadgars on 04/30/2022 01:58 pm
https://twitter.com/NASAGroundSys/status/1519712267306422272
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 05/04/2022 01:55 pm
https://twitter.com/jeff_foust/status/1521534870681530369
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: eeergo on 05/04/2022 04:20 pm
Cabana just noted the LH2 umbilical leak has been fixed, and they're working on "a few other things", among which I assume is the ICPS check valve.

Also looks like they're aiming at NET early June for the next WDR attempt, which would place rollout somewhere in the late May timeframe?

Also mentioned currently they're looking at rolling back to the VAB again after a successful WDR, not pressing on to launch directly.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 05/04/2022 05:05 pm
https://twitter.com/sciguyspace/status/1521898525889642496
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 05/04/2022 05:07 pm

NASA to Discuss Status of Artemis I Test, Launch (https://www.nasa.gov/press-release/nasa-to-discuss-status-of-artemis-i-test-launch)

NASA will hold a media teleconference at 3:30 p.m. EDT Thursday, May 5, to discuss the status of the next wet dress rehearsal test of the agency’s Space Launch System (SLS) rocket and Orion spacecraft at the agency’s Kennedy Space Center in Florida. The teleconference will stream live on the agency’s website.


The agency plans to conduct another attempt of the wet dress rehearsal in early June to demonstrate the ability to load propellant into the tanks and conduct a full launch countdown ahead of the Artemis I launch this summer.


Teleconference participants include:


- Jim Free, associate administrator, Exploration Systems Development Mission Directorate, NASA Headquarters in Washington
- Cliff Lanham, senior vehicle operations manager, NASA Exploration Ground Systems Program, NASA Kennedy
To participate by telephone, media must RSVP no later than two hours prior to the start of the event to: [email protected] 


NASA’s SLS rocket and Orion spacecraft arrived back at Kennedy’s Vehicle Assembly Building April 26 after a 10-hour journey from launch pad 39B. Since their arrival, teams have worked to replace a faulty upper stage check valve and repair a small leak within the tail service mast umbilical ground plate housing. The teams also have been performing additional checkouts while the spaceport’s supplier of gaseous nitrogen makes upgrades to their pipeline configuration to support Artemis I activities.


Through Artemis missions, NASA will land the first woman and the first person of color on the Moon, paving the way for a long-term lunar presence and serving as a steppingstone to send astronauts to Mars.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Vahe231991 on 05/04/2022 11:20 pm
https://twitter.com/sciguyspace/status/1521898525889642496
How were they able to solve the upper state issue, given that the helium value is extremely hard to reach? All I have is that even though the third wet dress rehearsal attempt focused only on the core stage, more progress was made in filling the core stage than in the first two attempts despite the LH2 leak. Glad they resolved the LH2 leak issue by fixing faulty kinks that caused the LH2 to leak from the umbilical tower.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: eeergo on 05/05/2022 08:01 am
https://twitter.com/sciguyspace/status/1521898525889642496
How were they able to solve the upper state issue, given that the helium value is extremely hard to reach? All I have is that even though the third wet dress rehearsal attempt focused only on the core stage, more progress was made in filling the core stage than in the first two attempts despite the LH2 leak. Glad they resolved the LH2 leak issue by fixing faulty kinks that caused the LH2 to leak from the umbilical tower.

Valve was only hard to reach out at the pad. Once the access platforms were installed in the VAB, it was probably a day's worth of work to open the LVSA service hatch, R&R it and leak check it.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: woods170 on 05/05/2022 11:34 am
https://twitter.com/sciguyspace/status/1521898525889642496 (https://twitter.com/sciguyspace/status/1521898525889642496)
How were they able to solve the upper state issue, given that the helium value is extremely hard to reach? All I have is that even though the third wet dress rehearsal attempt focused only on the core stage, more progress was made in filling the core stage than in the first two attempts despite the LH2 leak. Glad they resolved the LH2 leak issue by fixing faulty kinks that caused the LH2 to leak from the umbilical tower.

Valve was only hard to reach out at the pad. Once the access platforms were installed in the VAB, it was probably a day's worth of work to open the LVSA service hatch, R&R it and leak check it.

Yes. Standard DCSS helium valve R&R on a slightly stretched DCSS derivative. Most of the hardware and procedures for iCPS are legacy from the Delta IV program. Therefore, the swap of the helium valve was expected to be rather straightforward.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 05/05/2022 03:15 pm
https://twitter.com/NASAKennedy/status/1522221814625161218
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: zubenelgenubi on 05/05/2022 07:49 pm
Live from 3:30 pm EDT.

https://m.youtube.com/watch?v=68Ry7gsu87I

Relatively short statements; more/most time spent answering questions.  Ended circa 4:20 pm.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 05/05/2022 09:02 pm
https://twitter.com/NASA/status/1522298629331066880?cxt=HHwWgIC9tbaipaAqAAAA
https://twitter.com/JimFree/status/1522311677978492933?cxt=HHwWioCytfqZq6AqAAAA

And some update during telecon, by Bill Harwood:   8)

https://twitter.com/cbs_spacenews/status/1522313250616004614?cxt=HHwWjMCyvb_1q6AqAAAA
https://twitter.com/cbs_spacenews/status/1522313398158987264?cxt=HHwWgMCs4Yr-q6AqAAAA
https://twitter.com/cbs_spacenews/status/1522313518837555204?cxt=HHwWiICz8Y2FrKAqAAAA
https://twitter.com/cbs_spacenews/status/1522313807455997953?cxt=HHwWgsCyofSVrKAqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: FutureSpaceTourist on 05/16/2022 03:02 pm
https://twitter.com/nasaspaceflight/status/1526215623696695298

Quote
Currently looking at May 27 for rollout back to 39B, pending readiness.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 05/18/2022 05:31 pm

The rollout and WDR have been delayed, both are now scheduled for June.https://twitter.com/jeff_foust/status/1526977637301862403
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: FutureSpaceTourist on 05/26/2022 07:38 pm
https://twitter.com/nasagroundsys/status/1529909132056317952

Quote
Mega Moon Rocket Update: 5 of 10 service platforms surrounding @NASA_SLS & @NASA_Orion in High Bay 3 of the Vehicle Assembly Building at @NASAKennedy are now retracted in prep. for our next roll to the launch pad. Tune in to nasa.gov/live tomorrow at noon EDT for more!
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Targeteer on 05/26/2022 09:27 pm
And of course PAO didn't miss a chance to insert identity politics into a purely technical discussion "NASA will land the first woman and the first person of color on the Moon..."  Stop, just stop.


May 26, 2022
MEDIA ADVISORY M22-075
NASA to Discuss Status of Final Test Needed for Artemis I Moon Mission


NASA will hold a media teleconference at 12 p.m. EDT on Friday, May 27, to discuss the status of the next wet dress rehearsal test of the agency’s Space Launch System (SLS) rocket and Orion spacecraft at the agency’s Kennedy Space Center in Florida ahead of the uncrewed Artemis I lunar mission.

The rehearsal is the final test needed before launch and calls for NASA to test the system including operations to load propellant into the rocket’s tanks, conduct a full launch countdown, demonstrate the ability to recycle the countdown clock, and also drain the tanks to give them an opportunity to practice the timelines and procedures they will use for launch.

The teleconference will stream live on the agency’s website.

Participants include:

    Tom Whitmeyer, deputy associate administrator for common exploration systems development, NASA Headquarters
    Cliff Lanham, senior vehicle operations manager, Exploration Ground Systems Program, NASA’s Kennedy Space Center
    John Blevins, chief engineer, Space Launch System Program, NASA’s Marshall Space Flight Center

To participate by telephone, media must RSVP no later than two hours prior to the start of the event for call details at: [email protected] 



Engineers successfully completed work on items identified during the previous wet dress rehearsal tests including replacing and testing an upper stage check valve and  fixing a small leak within the tail service mast umbilical ground plate housing. Teams also completed some tasks originally scheduled to take place in the Vehicle Assembly Building (VAB) after wet dress rehearsal.

Through Artemis missions, NASA will land the first woman and the first person of color on the Moon, paving the way for a long-term lunar presence and serving as a steppingstone to send the first astronauts to Mars.

For updates, follow along on NASA’s Artemis blog at:
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: laszlo on 05/26/2022 10:17 pm
Assuming China, Russia or a private firm don't beat NASA to it.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: FutureSpaceTourist on 05/27/2022 12:50 pm
https://twitter.com/nasakennedy/status/1530167280985853952

Quote
Teams with @NASAGroundSys have successfully completed work to get the @NASA_SLS rocket & @NASA_Orion spacecraft ready for the next wet dress rehearsal test ahead of the #Artemis I mission.

Join us today at 12pm ET for a media teleconference to learn more: nasa.gov/live
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: yg1968 on 05/27/2022 02:32 pm
Artemis l Wet Dress Rehearsal Status Update:

https://youtu.be/jAumudhOFAI
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: FutureSpaceTourist on 05/27/2022 03:50 pm
https://twitter.com/nasaspaceflight/status/1530212831265701888

Quote
NASA looking at NET June 5 for SLS rollout to KSC 39B ahead of WDR-4 (Wet Dress Rehearsal).

Edit to add: actually June 6th

https://twitter.com/sciguyspace/status/1530219079537131521

Quote
Cliff Lanham, a NASA Exploration Ground Systems Program official, says NASA is targeting June 6 for the rollout of the SLS rocket to the launch site for the next wet-dress rehearsal attempt.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 06/10/2022 09:39 pm

NASA confirms the next Artemis 1 wet dress rehearsal is now scheduled to begin June 18.https://twitter.com/StephenClark1/status/1535375271154565120
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 06/17/2022 11:44 pm

Here is what many were asking for the WDR.https://youtu.be/AZccNId8jmQ
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/18/2022 04:53 pm
https://www.youtube.com/watch?v=4GoC0sksnoQ
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/18/2022 05:00 pm
https://twitter.com/NASAKennedy/status/1537880637943578635?cxt=HHwWloCgudmS09cqAAAA
https://twitter.com/NASAArtemis/status/1537907858217394176?cxt=HHwWgICjpZDD39cqAAAA
https://twitter.com/NASAGroundSys/status/1537879576356958209?cxt=HHwWgsCtgfTU0tcqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 06/18/2022 05:14 pm
Just a reminder:
According to the Spaceflight Now stream, the call to stations for the firing room teams is today at 5 p.m. EDT (9 p.m. GMT) for the start of the countdown.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/19/2022 04:09 pm
https://twitter.com/NASAGroundSys/status/1538537351344955396?cxt=HHwWiICxybnk_dkqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/19/2022 04:14 pm
https://twitter.com/NASAKennedy/status/1538543843267776513?cxt=HHwWgsC4laregNoqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:11 am
https://twitter.com/NASAGroundSys/status/1538836444927692805?cxt=HHwWisC4tf7lhdsqAAAA
https://twitter.com/JimFree/status/1538837216235073537?cxt=HHwWgsC9jfGShtsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:14 am
https://twitter.com/JimFree/status/1538838320209608705?cxt=HHwWgoDSrZLThtsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: FutureSpaceTourist on 06/20/2022 11:15 am
https://twitter.com/nasagroundsys/status/1538842386192818181

Quote
The mission management team chair has given a “go” to proceed with tanking @NASA_SLS. The launch director will give the “go” to officially begin the tanking process. Weather remains favorable for the test.
MORE: go.nasa.gov/3y7gYE5
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: FutureSpaceTourist on 06/20/2022 11:16 am
Coverage is live, although currently showing pre-recorded features:

https://youtu.be/AZccNId8jmQ
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:17 am
https://twitter.com/cbs_spacenews/status/1538836393954316289?cxt=HHwWgsC40YLjhdsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:19 am
Here WE GO !!  :)

https://twitter.com/NASAGroundSys/status/1538842386192818181?cxt=HHwWioCzpei_iNsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:23 am
Right now, on NASA TV media channel...
https://www.youtube.com/watch?v=nA9UZF-SZoQ
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:30 am
Holding at 6 hours 40 mn to resoleve somme issue with ground system.

https://twitter.com/cbs_spacenews/status/1538846056066203649?cxt=HHwWgoCy_baVitsqAAAA
https://twitter.com/cbs_spacenews/status/1538846256260386819?cxt=HHwWhsC4xYqhitsqAAAA
https://twitter.com/cbs_spacenews/status/1538847104583577600?cxt=HHwWgMC9hbvSitsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:31 am
https://twitter.com/NASAGroundSys/status/1538846484254294017?cxt=HHwWgoCwna2uitsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:45 am
https://twitter.com/cbs_spacenews/status/1538850106853707776?cxt=HHwWgMCy2ZuBjNsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: FutureSpaceTourist on 06/20/2022 11:45 am
https://twitter.com/nasagroundsys/status/1538850360802037760

Quote
UPDATE: A valve for the redundant gaseous nitrogen (GN2) line has now been repaired. The launch team is assessing next steps and continue to be in an extended hold.
Stay tuned to nasa.gov/live for ongoing updates.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 12:06 pm
https://twitter.com/SpaceflightNow/status/1538855270457163776?cxt=HHwWgICyxeOtjtsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 12:09 pm
https://twitter.com/cbs_spacenews/status/1538855939759128578?cxt=HHwWhIC-nd7UjtsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 12:36 pm
Countdown will resume at 9:20am; T-0 expected at ~4:30pm

https://twitter.com/NASAGroundSys/status/1538863322321326080?cxt=HHwWgMC4zbqCktsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Robert_the_Doll on 06/20/2022 12:52 pm
"SLS/Artemis 1 (T-6h40m; 8:35am EDT): The GN2 controller is now working normally and both supply lines are showing the correct pressure; the team is ready to proceed with tanking; chilldown will begin at 9:05am EDT; countdown will resume at 9:20am; T-0 expected at ~4:30pm"


https://twitter.com/cbs_spacenews/status/1538863112799105025?cxt=HHwWgsC9xaH2kdsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 01:00 pm
UPDATE: Launch Director Charlie Blackwell-Thompson has now given the 'go' for tanking.

https://twitter.com/NASAGroundSys/status/1538868146785996800?cxt=HHwWgMC-1aOblNsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 01:06 pm
SLS/Artemis 1 (T-6h40m; 9am EDT): LD Charlie Blackwell-Thompson has given a 'go' for tanking; in other news, Jeremy Graeber, assistant LD, says a waiver will be processed for a slightly low electrical resistance reading in the left SRB's APU; not a constraint for fueling

https://twitter.com/cbs_spacenews/status/1538870086706003971?cxt=HHwWhoCwmZmMldsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: SpeakertoAnimals on 06/20/2022 01:12 pm
SLS/Artemis 1 (T-6h40m; 9am EDT): LD Charlie Blackwell-Thompson has given a 'go' for tanking; in other news, Jeremy Graeber, assistant LD, says a waiver will be processed for a slightly low electrical resistance reading in the left SRB's APU; not a constraint for fueling

https://twitter.com/cbs_spacenews/status/1538870086706003971?cxt=HHwWhoCwmZmMldsqAAAA
Proceed. What could possibly go wrong with an electrical problem in a solid rocket engine?
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: DaveS on 06/20/2022 01:24 pm
SLS/Artemis 1 (T-6h40m; 9am EDT): LD Charlie Blackwell-Thompson has given a 'go' for tanking; in other news, Jeremy Graeber, assistant LD, says a waiver will be processed for a slightly low electrical resistance reading in the left SRB's APU; not a constraint for fueling

https://twitter.com/cbs_spacenews/status/1538870086706003971?cxt=HHwWhoCwmZmMldsqAAAA (https://twitter.com/cbs_spacenews/status/1538870086706003971?cxt=HHwWhoCwmZmMldsqAAAA)
Proceed. What could possibly go wrong with an electrical problem in a solid rocket engine?
It's just a slightly low impedance and it has been historically at that slightly low point. No concern for powering up the APU when the Terminal Count reaches that point. And the motor itself is fine, it's just the APU portion of the Hydraulic Power Unit (HPU) for the left SRB that lives in the conical Aft Skirt. The APU despite its name, doesn't provide any electrical power, just the hydraulic pressure needed to move the rock/tilt actuators that move the SRB nozzle for steering as commanded by the guidance system.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 01:24 pm
UPDATE: New start time 9:28 a.m. EDT, T-0 4:38 p.m

https://twitter.com/NASAGroundSys/status/1538875100753174528?cxt=HHwWgICx4Yawl9sqAAAA

Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 01:29 pm
The countdown has resumed !!  :)

https://twitter.com/SpaceflightNow/status/1538877579633074177?cxt=HHwWgoC97avAmNsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 01:30 pm
SLS/Artemis 1 (T-6h40m; 09:28am EDT): NASA resumed the countdown at 9:28am at the T-minus 6h40m mark, eight minutes later than had been expected; core stage liquid oxygen "slow-fill" expected to begin just after 10am; new simulated T-0 is 4:38pm (2038 UTC)

https://twitter.com/cbs_spacenews/status/1538876547414822922?cxt=HHwWlMC4naGEmNsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 01:50 pm
Tanking has begun with chilling down the liquid oxygen propellant lines for core stage. In sequential fashion, liquid oxygen and liquid hydrogen will flow into the rocket’s core stage and interim cryogenic propulsion stage tanks and be topped off as some propellant boils off.

https://twitter.com/NASAGroundSys/status/1538877376742006787?cxt=HHwWhoC9mcS0mNsqAAAA

New Artemis I wet dress rehearsal milestones:
✔ Liquid Oxygen transfer line chilled down
✔ Helium pressurized to flight level
✔ Main propulsion chilldown initiated


https://twitter.com/NASAGroundSys/status/1538880478031269891?cxt=HHwWhsCyzYbpmdsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 06/20/2022 02:04 pm
LOX tanking is scheduled to start in just a few minutes.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 06/20/2022 02:12 pm
They said "This is Artemis Launch Control."
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 06/20/2022 02:13 pm
The chilling of the transfer lines for the LH2 tank will begin in 10 minutes.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 02:15 pm
The Space Launch System’s core stage is now being loaded with liquid oxygen in “slow fill” mode for today’s countdown rehearsal.
This begins the process to pump 755,000 gallons of super-cold propellants into the vehicle at the Kennedy Space Center.


https://twitter.com/SpaceflightNow/status/1538887644884701187?cxt=HHwWhsC46ZuKndsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 02:23 pm
We ate now, in fast fill (LOX) Core Stage

https://twitter.com/NASAGroundSys/status/1538890100494454790?cxt=HHwWjMCyxZOZntsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: mrhuggy on 06/20/2022 02:33 pm
They have a go for LH2 fill, pre chilling the lines then on to slow fill.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 02:33 pm
Now, LC give the GO for Core Stage LH2 tanking

UPDATE: We have now entered chilldown of the
@NASA_SLS
 liquid hydrogen transfer line.


https://twitter.com/NASAGroundSys/status/1538892783259377664?cxt=HHwWgICz2ae1n9sqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 06/20/2022 02:38 pm
According to the Spaceflight Now stream of the WDR, NASA reports that the test director over in Firing Room 1 at the Launch Control Center at the Kennedy Space Center has given a go for LH2 (liquid hydrogen) tanking operations. This will begin with the chilling of the transfer lines of the LH2 tank on the SLS rocket.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 06/20/2022 02:45 pm
NASA has now confirmed that LH2 (liquid hydrogen) is flowing into the core stage.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 06/20/2022 02:48 pm
The transition to fast fill of the core stage is about 10 minutes away.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 03:09 pm
SLS/Artemis 1 (T-5h06m; 11:01am EDT): Hydrogen loading has NOT yet started; NASA says the team is chilling down an LH2 line leading to the SLS upper stage to minimize pressure spikes seen during earlier fueling attempts; not clear from NASA commentary when LH2 loading will begin

https://twitter.com/cbs_spacenews/status/1538901093010243585?cxt=HHwWgoCwlYCZo9sqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 03:11 pm
LH2 now on slow fill.

https://twitter.com/NASAGroundSys/status/1538902578112696321?cxt=HHwWgsC4hbnvo9sqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 03:31 pm
Curious about Charlie Blackwell-Thompson, Exploration Ground Systems'
@NASAArtemis
 Launch Director at helm for today's wet dress rehearsal activities? Bookmark this podcast!


https://twitter.com/NASAGroundSys/status/1538904918643326977?cxt=HHwWgoCyrdf3pNsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 03:32 pm
LH2 now on fast fill.

UPDATE: The team has entered liquid hydrogen fast fill into the core stage of
@NASA_SLS
.

https://twitter.com/NASAGroundSys/status/1538907754856947712?cxt=HHwWgIC95eKcptsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 03:35 pm
NASA confirms the liquid hydrogen load has transitioned to “fast fill” on the core stage of the SLS moon rocket.
This moves the countdown rehearsal past the point where the launch team detected a hydrogen leak in April.


https://twitter.com/SpaceflightNow/status/1538907317718114304?cxt=HHwWgICz7amDptsqAAAA

SLS/Artemis 1 (T-4h37m; 11:31am EDT): NASA reports liquid hydrogen is now in fast fill; no leaks reported, indicating work to fix a fuel-line attachment fitting at the base of the rocket was successful

https://twitter.com/cbs_spacenews/status/1538907885144526849?cxt=HHwWgsCywa2kptsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 03:38 pm
SLS/Artemis 1 (T-4h33m; 11:34am EDT): NASA commentator Derrol Nail reports the core stage liquid oxygen tank is now 38% loaded while liquid hydrogen is at <5%, but now in fast-fill mode; fingers crossed!

https://twitter.com/cbs_spacenews/status/1538908703067455490?cxt=HHwWhIC-wfvTptsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 03:48 pm
Right now, LH2: 20 %, LOX: 46%
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 03:50 pm
Next main event: second (ICPS) stage tanking...  8)
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Vahe231991 on 06/20/2022 03:53 pm
Right now, LH2: 20 %, LOX: 46%
More progress made in filling one of the core stages with LH2 than the April 14 WDR test! Fourth Third WDR test looking more and more probably the charm this time.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 04:05 pm
UPDATE:
@NASA_SLS
 fast fill continues. LOX is currently at 58%, LH2 at 52%.


https://twitter.com/NASAGroundSys/status/1538915455292817408?cxt=HHwWgICywf_cqdsqAAAA

SLS/Artemis 1 (T-4h00m; 12:07pm EDT): LH2 at >52% loaded; LOX at >58%; NASA commentator Derrol Nail: "things are looking good so far"

https://twitter.com/cbs_spacenews/status/1538917267207073795?cxt=HHwWhsC9qbvGqtsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 04:26 pm
UPDATE:
@NASA_SLS
 is currently at 67% LH2, 63% LOX.


https://twitter.com/NASAGroundSys/status/1538918521257730056?cxt=HHwWkICx3bqPq9sqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: cplchanb on 06/20/2022 04:39 pm
It's interesting how the hydrogen fill started much later behind oxygen yet it has now surpassed it in fill volume. Is there a reason for that?
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 04:40 pm
UPDATE: Cryogenic propellant loading continues into the core stage of
@NASA_SLS
. We are currently at 76% full with LOX and 98% full with LH2. LH2 fast fill has stopped, and we have transitioned to liquid hydrogen topping.


https://twitter.com/NASAGroundSys/status/1538924226467532802?cxt=HHwWhMC47cXbrdsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: 2024MoonShot on 06/20/2022 04:41 pm
Hydrogen is lighter and less denser than oxygen thus it fills at a faster rate.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 04:46 pm
UPDATE: LOX now 80% full, LH2 holding at 100% full and in replenish mode.

https://twitter.com/NASAGroundSys/status/1538925379557150720?cxt=HHwWgMCyhdWertsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 04:49 pm
Waiting for ICPS tanking, now...
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: SWGlassPit on 06/20/2022 04:53 pm
Quick little gif I threw together to show how much the core stage shrinks due to the thermal contraction during cryo load

Edit: you'll have to click to the picture to get the animation to play
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 05:03 pm
Some venting...
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 05:05 pm
Second stage now in chilldown (slightly behind schedule)

UPDATE: Interim cryogenic propulsion stage (ICPS) is now in chilldown for liquid hydrogen.

https://twitter.com/NASAGroundSys/status/1538930918748049408?cxt=HHwWgMC-nYvhsNsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 05:15 pm
CS Tanking status.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 05:32 pm
We are now in Core stage LOX and LH2 replenish.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 05:33 pm
UPDATE: Liquid oxygen & liquid hydrogen tanks in @NASA_SLS core stage are both 100% full and in replenish mode, replacing anything lost due to boil off. Upper stage liquid hydrogen is now in fast fill.

https://twitter.com/NASAGroundSys/status/1538937821758738433?cxt=HHwWgsC-1fLys9sqAAAA

The launch control team is filling the Space Launch System’s interim cryogenic propulsion stage (ICPS) with liquid hydrogen (LH2) followed by liquid oxygen (LOX) loading. The core stage LH2 and LOX tanks will be full through the rest of the countdown.

https://twitter.com/NASAGroundSys/status/1538941192557277185?cxt=HHwWgsC9iY23tdsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Robert_the_Doll on 06/20/2022 05:38 pm
A Falcon 9 first stage decided to meander along into view on its way to one of the SpaceX launch sites:

https://twitter.com/SpaceflightNow/status/1538933533829484544?cxt=HHwWgMC-jaf5sdsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 05:50 pm
UPDATE: The @NASA_SLS liquid oxygen core stage tank is now in stable replenish.


https://twitter.com/NASAGroundSys/status/1538941718300598272?cxt=HHwWgICxldrVtdsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 06:07 pm
Team is dealing on some issue with a leak on LH2 quick disconnect
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 06:13 pm
UPDATE: Liquid oxygen upper stage is now in stop flow. The team has discovered a hydrogen leak at a quick disconnect for the core stage and are currently working to understand the situation

https://twitter.com/NASAGroundSys/status/1538947881440362497?cxt=HHwWgoC-kbm8uNsqAAAA

NASA says there are three issues now under evaluation.
• A “small grass fire” near the hydrogen flare stack at pad 39B
• A possible hydrogen leak in a quick disconnect on the SLS core stage
• A pressure limit was exceeded up an upper stage skid


https://twitter.com/SpaceflightNow/status/1538948136969949184?cxt=HHwWgMC-_ajLuNsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 06:41 pm
Upper stage liquid hydrogen is now full.
The team is still troubleshooting the leak at the core stage quick disconnect.
Team is working to manually adjust the LOX pressure in upper stage to get back into tanking.
Plan for small fire at pad is to allow it to burn out.


https://twitter.com/NASAGroundSys/status/1538954625998536704?cxt=HHwWgICygYTFu9sqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 06:47 pm
SLS/Artemis 1 (T-1h32m; 2:35pm EDT): The ICPS upper stage hydrogen tank is full; oxygen loading was halted when pressure in a feed line exceeded specifications; engineers are implementing a plan to reset valves, reducing pressure, before continuing with loading

https://twitter.com/cbs_spacenews/status/1538955133408759810?cxt=HHwWhMC-wcjiu9sqAAAA

SLS/Artemis 1: In an unrelated issue, an LH2 leak showed up in the east-side core stage umbilical during an "engine bleed kickstart" procedure; not yet clear what impact that might have; as for the grass fire, it's headed for a dirt road at the pad where it should burn itself out

https://twitter.com/cbs_spacenews/status/1538955238249533440?cxt=HHwWgMC40dXou9sqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 07:06 pm
SLS/Artemis 1 (T-1h06m; 3:01pm EDT): Engineers resumed oxygen loading of the ICPS upper stage after reducing pressure in a feed line; as for the LH2 leak in he core stage quick disconnect, engineers are going to warm the fitting then re-chill it to coax a seal to re-seat itself

https://twitter.com/cbs_spacenews/status/1538961304781733890?cxt=HHwWhICy6eTJvtsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 07:08 pm
UPDATE: The team was successful in troubleshooting pressure issues and have currently resumed upper stage LOX fill.
The team is pursing a potential fix for the core stage quick disconnect leak.


https://twitter.com/NASAGroundSys/status/1538961845050023936?cxt=HHwWgICxkZ7pvtsqAAAA

Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Vahe231991 on 06/20/2022 07:16 pm
SLS/Artemis 1 (T-1h32m; 2:35pm EDT): The ICPS upper stage hydrogen tank is full; oxygen loading was halted when pressure in a feed line exceeded specifications; engineers are implementing a plan to reset valves, reducing pressure, before continuing with loading

https://twitter.com/cbs_spacenews/status/1538955133408759810?cxt=HHwWhMC-wcjiu9sqAAAA

SLS/Artemis 1: In an unrelated issue, an LH2 leak showed up in the east-side core stage umbilical during an "engine bleed kickstart" procedure; not yet clear what impact that might have; as for the grass fire, it's headed for a dirt road at the pad where it should burn itself out
https://twitter.com/cbs_spacenews/status/1538955238249533440?cxt=HHwWgMC40dXou9sqAAAA
Luckily the grass fire wasn't too severe. Nevertheless, tremendous progress made in WDR test #4 #3 compared to the April 14 WDR test.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: AstroWare on 06/20/2022 07:37 pm


SLS/Artemis 1 (T-1h32m; 2:35pm EDT): The ICPS upper stage hydrogen tank is full; oxygen loading was halted when pressure in a feed line exceeded specifications; engineers are implementing a plan to reset valves, reducing pressure, before continuing with loading

https://twitter.com/cbs_spacenews/status/1538955133408759810?cxt=HHwWhMC-wcjiu9sqAAAA

SLS/Artemis 1: In an unrelated issue, an LH2 leak showed up in the east-side core stage umbilical during an "engine bleed kickstart" procedure; not yet clear what impact that might have; as for the grass fire, it's headed for a dirt road at the pad where it should burn itself out
https://twitter.com/cbs_spacenews/status/1538955238249533440?cxt=HHwWgMC40dXou9sqAAAA
Luckily the grass fire wasn't too severe. Nevertheless, tremendous progress made in WDR test #3 compared to the April 14 WDR test.

I think you have said "WDR #3" twice now, but this is the fourth WDR. per the NASA blog, the April 14th test was #3.

Just FYI.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 07:40 pm
Some closeup of the Core Stage...
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 07:41 pm
UPDATE: Three of the four @NASA_SLS tanks are now fully filled.
Liquid oxygen is currently at fast fill for upper stage.
Team is working a plan to reseal at the hydrogen leak


https://twitter.com/NASAGroundSys/status/1538969535272955906?cxt=HHwWhMC94e6owtsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: FutureSpaceTourist on 06/20/2022 07:47 pm
https://youtu.be/JEhxWboSpM0
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: tea monster on 06/20/2022 07:52 pm
Hopefully the hydrogen leak gets fixed. EDIT: If they can't fix the leak on the quick disconnect, will they roll it back to fix it, or will they work on a copy of the QD off-site and qualify it separately?

Reading the comments in the Space Flight Now YouTube stream is a trip. I had no idea that NASA were developing a flyback booster for SLS to make it economically competitive with other launchers! Well, the things you learn on YouTube!  ;D ;D
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 08:00 pm
NASA says initial troubleshooting of the hydrogen leak in a core stage quick disconnect has not fixed the problem. Engineers are assessing other options to try to seal the leak.

The countdown has stopped at a pre-planned hold point at T-minus 10 minutes.


https://twitter.com/SpaceflightNow/status/1538975267552731137?cxt=HHwWgoC9ycP2xNsqAAAA

SLS/Artemis 1 (T-10m; 3:58pm EDT): The countdown has entered a planned 30-minute hold at the T-minus 10-minute point; in the meantime, an attempt to re-seat a seal in the core stage hydrogen quick-disconnect fitting did not work and the leak is still present; stay tuned

https://twitter.com/cbs_spacenews/status/1538975119481180167?cxt=HHwWjsC4rfTtxNsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: hektor on 06/20/2022 08:25 pm
I have the feeling that this hold is going to last longer than 30 minutes.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Hog on 06/20/2022 08:29 pm
I have the feeling that this hold is going to last longer than 30 minutes.
Is that an L-2 "feeling" or a  public "feeling"?
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: hektor on 06/20/2022 08:31 pm
 public "feeling"

I am in Europe.  ;D
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 08:37 pm
SLS/Artemis 1 (T-10m; 4:31pm EDT): The ongoing hold has been extended to give engineers more time to resolve the leak in the core stage hydrogen quick-disconnect fitting, part of a system used to control pressure in the tank

https://twitter.com/cbs_spacenews/status/1538983591203508227?cxt=HHwWhsC4zYPbyNsqAAAA

SLS/Artemis 1: The core stage oxygen tank is in replenish mode; the core stage and upper stage liquid hydrogen tanks are in "stop flow" due to the QD leak; upper stage LOX tank also is in stop flow while a planned functional test is carried out

https://twitter.com/cbs_spacenews/status/1538984024768659456?cxt=HHwWgICy9aH0yNsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 09:04 pm


https://twitter.com/NASAGroundSys/status/1538987455784927233?cxt=HHwWgoC-_fy7ytsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 09:06 pm
UPDATE: LH2 leak is a seal issue and the team is working proposals. The team has been strategizing and would like to put the LH2 core stage back into replenish to get through as close to T-1 min 30 seconds as possible.

https://twitter.com/NASAGroundSys/status/1538991729361272832?cxt=HHwWgIC-zd20zNsqAAAA

SLS/Artemis 1 (T-10m; 5:02pm EDT): Despite a leaky seal in a core stage LH2 quick-disconnect fitting, the team is assessing possible scenarios to resume LH2 replenish and get down to around the T-minus 90-second mark to meet some of the terminal count objectives

https://twitter.com/cbs_spacenews/status/1538991551313022978?cxt=HHwWhMC4ha-qzNsqAAAA

SLS/Artemis 1: The only way to do that apparently is to force the ground launch sequencer to ignore the leak indications, which may be acceptable given this isn't an actual launch attempt; not yet clear if that scenario will be approved or how long it might take to implement

https://twitter.com/cbs_spacenews/status/1538992153157947392?cxt=HHwWgMC-kbPNzNsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 09:44 pm
UPDATE: Upper stage LOX currently in topping and about to go into replenish.
Upper stage LH2, core stage LH2, & core stage LOX all in replenish.
Team is still working a plan to resume countdown through T-10.


https://twitter.com/NASAGroundSys/status/1539001246752858112?cxt=HHwWgICz2dve0NsqAAAA

NASA’s Artemis launch team is now discussing resuming the countdown rehearsal and running the clock to T-minus 33 seconds, despite the hydrogen leak in a bleed line in tail service mast umbilical near the bottom of the rocket.

https://twitter.com/SpaceflightNow/status/1539000824411602944?cxt=HHwWgICygZHG0NsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 10:07 pm
UPDATE: All four @NASA_SLS propellant tanks are now fully fueled and in replenish.

https://twitter.com/NASAGroundSys/status/1539001703818743814?cxt=HHwWjMCyjan50NsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 10:10 pm
We have cameras on pad 39A and 39B at the Kennedy Space Center.

At 39A, SpaceX has erected a large crane to support construction of the Florida launch pad for the Starship rocket.

At 39B, NASA has fully fueled the Artemis 1 moon rocket.


https://twitter.com/SpaceflightNow/status/1539003313030561792?cxt=HHwWgICw1f7W0dsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 10:11 pm
UPDATE: The team may decide to continue terminal count with certain issues masked in order to get further into the testing for today's wet dress rehearsal.

https://twitter.com/NASAGroundSys/status/1539007604277616641?cxt=HHwWgoC9-eLQ09sqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Vahe231991 on 06/20/2022 10:40 pm
UPDATE: The team may decide to continue terminal count with certain issues masked in order to get further into the testing for today's wet dress rehearsal.

https://twitter.com/NASAGroundSys/status/1539007604277616641?cxt=HHwWgoC9-eLQ09sqAAAA
From Twitter:
https://twitter.com/Bubbinski/status/1539014945559392256

Since tremendous progress was made in WDR#4, NASA finds it better to complete the rehearsal regardless of a minor issue.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 10:42 pm
The team has done a fantastic job developing a plan for the rest of our time today. We want to get most out of test today, because the more we do, the more we learn. We will get as deep as we can in the count, but may stop to keep @NASA_SLS and @NASA_Orion safe.

https://twitter.com/JimFree/status/1539014638243037184?cxt=HHwWgIDSiZrq1tsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 10:44 pm
NASA engineers now hope to pick up the Artemis 1 countdown rehearsal — with the hydrogen leak masked from computers to avoid an automatic hold — and run the clock down to T-minus 9 seconds, just prior to when the engines would ignite on launch day.

https://twitter.com/SpaceflightNow/status/1539015643579748354?cxt=HHwWhMC4tdyk19sqAAAA

If the Mission Management Team approves the plan, the Artemis team would only run through the terminal countdown once today. Officials originally wanted to get through the sequence two times.

https://twitter.com/SpaceflightNow/status/1539016020064669697?cxt=HHwWgsC4udG619sqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:05 pm
UPDATE: Mission management and launch teams have completed their poll and are moving forward with T-10 countdown in a modified configuration for Artemis I wet dress rehearsal.

https://twitter.com/NASAGroundSys/status/1539021303486742529?cxt=HHwWgoCwgZbu2dsqAAAA

SLS/Artemis 1 (T-10m; 7:03pm EDT): The MMT has voted to press ahead with the terminal countdown sequence in an attempt to take the clock all the way down to T-minus 9.3 seconds; the team will skip first carrying out a recycle at 33 seconds

https://twitter.com/cbs_spacenews/status/1539021479580409856?cxt=HHwWgICxgbb42dsqAAAA

SLS/Artemis 1: To pull this off, sensor data about the leaking quick-disconnect fitting will be "masked," but multiple computers are involved and there's no guarantee the count will make it all the way to 9.3 seconds, the point where the engine start sequence would normally begin

https://twitter.com/cbs_spacenews/status/1539021732153020416?cxt=HHwWgMCy6Y-H2tsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: DaveS on 06/20/2022 11:14 pm
This is no different than it would be on actual launch day, just ask the STS-68 crew. On August 18 1994, the RSLS issued an abort command at T-1.86 seconds due to Channel A HPOTP turbine discharge temperature on Engine 3 exceeded the LCC limit of 1560 Rankin. So they were 1.86 seconds away from actually launching until the RSLS said no. So a launch is not given until lift-off actually happens.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:26 pm
Here’s a timeline of what to expect in the final 10 minutes of the Artemis 1 countdown dress rehearsal this evening

https://twitter.com/SpaceflightNow/status/1539022978305908737?cxt=HHwWgoCzsdTP2tsqAAAA

Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:28 pm
Artemis launch director Charlie Blackwell-Thompson has polled her team and all positions reported “go” for the terminal countdown sequence, the final portion of today’s Space Launch System countdown rehearsal.

https://twitter.com/SpaceflightNow/status/1539027215484059648?cxt=HHwWgICw6aXG3NsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:28 pm
SLS/Artemis 1 (T-90s; 7:27pm EDT): NASA test director and Launch Director Charlie Blackwell-Thompson have polled their respective teams; everyone is go to pick up the countdown; the count will resume momentarily...

https://twitter.com/cbs_spacenews/status/1539027328411516930?cxt=HHwWhICyme_M3NsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:29 pm
T-minus 10 minutes and counting. The countdown clock has resumed for the Artemis 1 wet dress rehearsal.

https://twitter.com/SpaceflightNow/status/1539027560092340224?cxt=HHwWgMC4ra3a3NsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:32 pm
SLS/Artemis 1 (T-9m45s; 7:28pm EDT): The terminal countdown has resumed; planned T-0 is 7:37pm

https://twitter.com/cbs_spacenews/status/1539027561283522560?cxt=HHwWgMC4nbba3NsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:36 pm
SLS/Artemis 1 (T-4m00s): Core stage auxiliary power unit start

https://twitter.com/cbs_spacenews/status/1539028865309368320?cxt=HHwWgICz_amm3dsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:37 pm
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:38 pm
Hold and cutoff.

SLS/Artemis 1 (T-0m29s): HOLD! Vehicle safing underway; the ground launch sequencer commanded a cutoff, presumably due to flags triggered by the leaking LH2 quick disconnect fitting, but no confirmation yet

https://twitter.com/cbs_spacenews/status/1539030125899137024?cxt=HHwWgIC-jdrv3dsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:39 pm
The SLS main engines have completed their steering check

https://twitter.com/SpaceflightNow/status/1539030035113312258?cxt=HHwWhICw2bXq3dsqAAAA

Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:41 pm
Safing of the vehicle is in progress...
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:47 pm
Vehicle safing  still underway.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:50 pm
UPDATE: The launch team went through the T-10 countdown stopping at T-29 seconds. They are currently safing the vehicle.

https://twitter.com/NASAGroundSys/status/1539032031979528192?cxt=HHwWgICzwdPe3tsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:51 pm
"critical" portion of the safing is now complete
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/20/2022 11:53 pm
SLS/Artemis 1: The good news? The team successfully fueled the SLS and made it down to inside 33 seconds, a major milestone verifying most of the terminal countdown procedures; but NASA still faces a hydrogen leak in a core stage quick-disconnect fitting; impact TBD

https://twitter.com/cbs_spacenews/status/1539032574592434176?cxt=HHwWgICypZ7-3tsqAAAA

SLS/Artemis 1: In the near term, engineers will work through procedures to drain the SLS of its 750,000-gallon load of liquid oxygen and hydrogen fuel while mission managers review what went right today and what didn't; NASA promises an update from the launch director shortly

https://twitter.com/cbs_spacenews/status/1539033399377244162?cxt=HHwWhMC9tZ-u39sqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/21/2022 12:00 am
Launch director update.

The team has wrapped wet dress rehearsal for the day. Artemis I Launch Director Charlie Blackwell-Thompson said this was a "great day for our team" and she was "really proud of the team and all they've done to get us here."

https://twitter.com/NASAGroundSys/status/1539036703691776000?cxt=HHwWgICxvcru4NsqAAAA

SLS/Artemis 1: Launch director Charlie Blackwell-Thompson says she's pleased the team finally got the SLS core and upper stage fully loaded; but she says it's too early to say what NASA's next steps might be and did not address what might be needed to fix the leaking QD fitting

https://twitter.com/cbs_spacenews/status/1539036778706964483?cxt=HHwWhsC4sfny4NsqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 06/21/2022 12:05 am
End of NASA WDR coverage.
(and for me, too...  8) )
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: 2024MoonShot on 06/21/2022 12:10 am
Personal opinion: They'll have to do a WDR #5 after fixing the LH2 leak on the QD.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Vahe231991 on 06/21/2022 12:22 am
Personal opinion: They'll have to do a WDR #5 after fixing the LH2 leak on the QD.
Whether it doesn't happen or it does, NASA might be pleased that enough WDR objectives were achieved during today's largely successful WDR test to stick by a late August launch window for Artemis 1.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: russianhalo117 on 06/21/2022 12:29 am
Personal opinion: They'll have to do a WDR #5 after fixing the LH2 leak on the QD.
Whether it doesn't happen or it does, NASA might be pleased that enough WDR objectives were achieved during today's largely successful WDR test to stick by a late August launch window for Artemis 1.
The core stage is as I recall approaching its unwaivered limit on allowed number of cryogenic fill and drain cycles. It was in an SLS article and threads.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Vahe231991 on 06/21/2022 12:45 am
Personal opinion: They'll have to do a WDR #5 after fixing the LH2 leak on the QD.
Whether it doesn't happen or it does, NASA might be pleased that enough WDR objectives were achieved during today's largely successful WDR test to stick by a late August launch window for Artemis 1.
The core stage is as I recall approaching its unwaivered limit on allowed number of cryogenic fill and drain cycles. It was in an SLS article and threads.
As pointed out by NASA officials, issues with the ground equipment rather the SLS rocket itself were to blame for the failure to completely fuel the core stage during the core stages. Recall that WDR#3 for the SLS rocket did not involve fueling the ICPS stage because there was a malfunction of the helium valve during the first and second WDR tests.

No matter if there was an LH2 leak at the QD despite both stages being completely filled and the cause of the unintentional QD leak is determined, NASA most likely will lean towards the late August launch window for the Artemis 1 mission.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: jadebenn on 06/21/2022 01:42 am
The core stage is as I recall approaching its unwaivered limit on allowed number of cryogenic fill and drain cycles. It was in an SLS article and threads.
I think there was an update on that, where there'd been confusion between the cycles allocated for the Green Run WDR and the cycles available in general. I believe the tanks are rated for 22 cycles overall.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Vahe231991 on 06/21/2022 02:50 am
The core stage is as I recall approaching its unwaivered limit on allowed number of cryogenic fill and drain cycles. It was in an SLS article and threads.
I think there was an update on that, where there'd been confusion between the cycles allocated for the Green Run WDR and the cycles available in general. I believe the tanks are rated for 22 cycles overall.
The SLS rocket that is earmarked for the Artemis 1 mission had to taken back to the VAB for a few repairs because the first and second WDRs were beset by problems with ground equipment, and the third WDR suffered a liquid hydrogen leak at the umbilical tower, but the fact that the fourth WDR was a huge success notwithstanding a liquid hydrogen leak on the QD might lead NASA to evaluate whether the SLS fuel tanks can tolerate less than 22 cycles overall.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: russianhalo117 on 06/21/2022 03:07 am
Personal opinion: They'll have to do a WDR #5 after fixing the LH2 leak on the QD.
Whether it doesn't happen or it does, NASA might be pleased that enough WDR objectives were achieved during today's largely successful WDR test to stick by a late August launch window for Artemis 1.
The core stage is as I recall approaching its unwaivered limit on allowed number of cryogenic fill and drain cycles. It was in an SLS article and threads.
As pointed out by NASA officials, issues with the ground equipment rather the SLS rocket itself were to blame for the failure to completely fuel the core stage during the core stages. Recall that WDR#3 for the SLS rocket did not involve fueling the ICPS stage because there was a malfunction of the helium valve during the first and second WDR tests.

No matter if there was an LH2 leak at the QD despite both stages being completely filled and the cause of the unintentional QD leak is determined, NASA most likely will lean towards the late August launch window for the Artemis 1 mission.
That is completely unrelated to my post. Every fill attempt that results in cryogenic fluids reaching flight side of the core stage umbilical plates count however those that dont partially fill the tanks can be waived. Every pressurisation to flight and test pressures with or without cryogenic fluids also counts yet only as a technicality.
The core stage is as I recall approaching its unwaivered limit on allowed number of cryogenic fill and drain cycles. It was in an SLS article and threads.
I think there was an update on that, where there'd been confusion between the cycles allocated for the Green Run WDR and the cycles available in general. I believe the tanks are rated for 22 cycles overall.
Yep just found the article and was about to update my post to reflect. There is also a separate target limit for the KSC battleship testing campaign which include WDR, and the cancelled FRF. I was referring to the KSC limit and should have stated that.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Khadgars on 06/21/2022 03:14 am
Very successful WDR, if the cause of the abort was the handover to flight control system that then flagged the masked H2 leak I think that provides enough data to close out the WDR imo.  Hopefully we get some good information tomorrow.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 06/21/2022 02:00 pm
Post-test media teleconference for the Artemis I wet dress rehearsal (15:00 UTC June 21th.)
https://youtu.be/C_Ku7BnP6hs
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: woods170 on 06/21/2022 03:01 pm
Post-test media teleconference for the Artemis I wet dress rehearsal (15:00 UTC June 21th.)
https://youtu.be/C_Ku7BnP6hs

Good. I hope someone asks a question about current detanking status of SLS.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 06/21/2022 05:08 pm

Summary:


- Important objectives were achieved during the test which will help prepare for the launch.
- Progress was made beyond previous attempts and good results were achieved.
- NASA teams and contractors worked well throughout the process.
- The LH2 leak was detected, an attempt was made to repair it during the test, but it was not possible, however, the test was able to continue.
- Orion spacecraft responded well to individual tests and in conjunction with the rocket.
- All data needs to be analyzed to determine if another WDR is needed or if it is time to return to the VAB to prepare the rocket for launch.
- The teams knew there would be a Hold before T-9.3s due to the leak, but it was not known when it would be, ultimately it was at T-29 seconds.
- It is still too early to know a concrete launch date, waiting for the data review to know what the next step is.
- The final countdown and the last 10 minutes went as expected and the data obtained was the most important thing.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: zubenelgenubi on 06/23/2022 03:42 am
Moderator:
I split/moved multiple posts to the discussion thread.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: FutureSpaceTourist on 06/23/2022 11:57 am
https://spaceflightnow.com/2022/06/22/nasa-not-planning-another-artemis-1-countdown-dress-rehearsal/

Quote
NASA not planning another Artemis 1 countdown dress rehearsal
June 22, 2022 Stephen Clark

Forgoing another countdown rehearsal, NASA plans to return the first Space Launch System rocket to its assembly hangar at the Kennedy Space Center next week for a hydrogen leak repair and continued preparations for liftoff on the Artemis 1 moon mission.

The article cites sources from late Wednesday.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 06/23/2022 12:06 pm
When does rollback to the VAB look like? Will it happen before the end of this month or will it happen sometime in July?
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Vahe231991 on 06/23/2022 02:58 pm
https://spaceflightnow.com/2022/06/22/nasa-not-planning-another-artemis-1-countdown-dress-rehearsal/

Quote
NASA not planning another Artemis 1 countdown dress rehearsal
June 22, 2022 Stephen Clark

Forgoing another countdown rehearsal, NASA plans to return the first Space Launch System rocket to its assembly hangar at the Kennedy Space Center next week for a hydrogen leak repair and continued preparations for liftoff on the Artemis 1 moon mission.

The article cites sources from late Wednesday.
Just as many predicted, the WDR#4 for the SLS slated for Artemis 1 accomplished enough objectives for NASA to decide on making just a few minor repairs and then continue preparing for the launch of Artemis 1.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: oldAtlas_Eguy on 06/23/2022 03:22 pm
When does rollback to the VAB look like? Will it happen before the end of this month or will it happen sometime in July?
9 or ten days from the decision date (today). Or about 1/2 July. Hopefully they get it rolling on 1 July (Friday) to allow for the usual work slowing over the 4th of July long weekend due to workforce doing long vacations. But manpower may not be a issue though with the rollback.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: FutureSpaceTourist on 06/23/2022 05:29 pm
No more WDR it seems - going for late August launch

https://twitter.com/jimfree/status/1540023601503535105

Quote
Join us tomorrow, June 24 for an #Artemis I update. We've identified next steps from our wet dress rehearsal data, including @NASAGroundSys bringing @NASA_SLS & @NASA_Orion back to the Vehicle Assembly Building to prepare for a targeted late August launch. go.nasa.gov/3Ownb1w
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 06/23/2022 05:38 pm
No more WDR it seems - going for late August launch

https://twitter.com/jimfree/status/1540023601503535105 (https://twitter.com/jimfree/status/1540023601503535105)

Quote
Join us tomorrow, June 24 for an #Artemis I update. We've identified next steps from our wet dress rehearsal data, including @NASAGroundSys bringing @NASA_SLS & @NASA_Orion back to the Vehicle Assembly Building to prepare for a targeted late August launch. go.nasa.gov/3Ownb1w

NASA will hold a media teleconference at 11 a.m. EDT Friday, June 24, to discuss next steps for the Artemis I mission with the Space Launch System (SLS) rocket and Orion spacecraft at the agency’s Kennedy Space Center in Florida. Audio of the call will livestream on NASA’s website.


Teams conducted a wet dress rehearsal Monday, June 20, to validate the timelines and procedures for launch, including loading propellant into the rocket’s tanks, performing the launch countdown through the handover to the automated launch sequencer, and draining the tanks.


NASA has reviewed the data from the rehearsal and determined the testing campaign is complete. The agency will roll SLS and Orion back to the Vehicle Assembly Building (VAB) at Kennedy next week to prepare the rocket and spacecraft for launch and repair a leak detected during the most recent rehearsal. NASA plans to return SLS and Orion to the pad for launch in late August. NASA will set a specific target launch date after replacing hardware associated with the leak.
https://www.nasa.gov/press-release/nasa-to-discuss-status-of-artemis-i-moon-mission-0
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 06/24/2022 04:28 pm
Next Steps for Artemis l
https://youtu.be/AOC1RDtV8vA

Summary:

- Good WDR data were collected and the test campaign is complete.
- Rollback July 1 or 2 (04:01 UTC).
- 6 to 8 weeks to prepare the rocket in the VAB for launch (if no unforeseen events).
- Minor testing is being done on the pad before returning to the VAB related to the HPU of an SRB as this was not tested on Monday due to the HOLD at T-29 seconds.
- Work remains at the VAB including: vehicle checkout, LH2 leak checkout, load flight software, install FTS hardware, install hardware for stage separation and SRBs.
- A possible launch date will be announced in about two weeks after starting work on the VAB.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 06/24/2022 11:32 pm
Next Steps for Artemis l

Summary:

- Good WDR data were collected and the test campaign is complete.
- Rollback July 1 or 2 (04:01 UTC).
- 6 to 8 weeks to prepare the rocket in the VAB for launch (if no unforeseen events).
- Minor testing is being done on the pad before returning to the VAB related to the HPU of an SRB as this was not tested on Monday due to the HOLD at T-29 seconds.
- Work remains at the VAB including: vehicle checkout, LH2 leak checkout, load flight software, install FTS hardware, install hardware for stage separation and SRBs.
- A possible launch date will be announced in about two weeks after starting work on the VAB.
This would suggest that the planned minor testing on the launch pad is to be done in the final days of June given that the rocket will be rolled back to the VAB in July.
The HPU test will be done tonight and the others the following week, including the hydrazine de-servicing.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 06/25/2022 07:59 pm
Test completed with HPU
https://twitter.com/cbs_spacenews/status/1540786077493084161
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 06/30/2022 01:31 pm
UPDATE: Rollback to the VAB is scheduled for Friday (July 1st).
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 06/30/2022 06:31 pm

NASA to Roll Artemis I Rocket and Spacecraft to VAB Today (https://blogs.nasa.gov/artemis/2022/06/30/nasa-to-roll-artemis-i-rocket-and-spacecraft-to-vab-today/)

NASA will roll the Space Launch System rocket and Orion spacecraft for the Artemis I mission from launch pad 39B to the Vehicle Assembly Building (VAB) at the agency’s Kennedy Space Center in Florida beginning June 30.
First motion for the rocket and spacecraft atop the mobile launcher is expected to occur at 8 p.m. EDT today. The 4-mile trek atop the crawler transporter from the launch pad to the VAB will take approximately 8-12 hours. The journey previously was expected to begin just after midnight on July 1 but was moved up by several hours due to forecasted weather in the area. Teams will continue monitoring weather in the area and the start of the roll is subject to change.
Teams completed the wet dress rehearsal test campaign for Artemis I on June 20 and have configured the rocket and spacecraft for return to the VAB. Once there, teams will replace a seal on the quick disconnect of the tail service mast umbilical to address a liquid hydrogen leak detected during the rehearsal along with final servicing and checkouts. NASA plans to return the mega Moon rocket to the pad for launch in late August and will set a specific target launch date after replacing hardware associated with the leak.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: zubenelgenubi on 06/30/2022 08:49 pm
Moderator:
I split/moved 21 posts to the discussion thread; mostly about Shuttle legacy or apparent legacy in SLS.

I expect we will open the Artemis I launch thread after the stack returns to the VAB!
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 06/30/2022 11:04 pm
https://twitter.com/spaceflightnow/status/1542641628019658757
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 06/30/2022 11:15 pm

Artemis I Rollback to VAB Rescheduled for July 1 (https://blogs.nasa.gov/artemis/2022/06/30/artemis-i-rollback-to-vab-rescheduled-for-july-1/)

Teams have rescheduled the return of the Space Launch System rocket and Orion spacecraft to the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center to Friday, July 1 due a concern with the condition of the crawlerway that leads from Launch Pad 39B to the VAB. First motion is now planned for 6 p.m. EDT.


This afternoon, teams conducted a series of conditioning efforts driving the massive transporter up and down the slope leading to the launch pad. The inclined pathway must be precisely level with an even distribution of the rocks that make up the crawlerway in order to support the load of the mobile launcher and rocket that it will carry.


Teams will continue grating, or sifting, the crawlerway overnight and the rocket and spacecraft remain in a safe configuration.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 07/01/2022 03:00 pm
https://twitter.com/nasagroundsys/status/1542882586468425729
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Vahe231991 on 07/02/2022 03:32 am
https://spaceflightnow.com/2022/07/02/artemis-1-rollback-to-vab/
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: zubenelgenubi on 07/02/2022 03:35 am
Are they moving yet?

Screencaps from the SFN feed.

Edit: No, not yet.  First motion at midnight EDT = 04:00 UTC.

Now first motion scheduled at 12:30 am.

12:45 am: Didn't happen yet.

1 am: Still not seeing any motion.; Mobile Launch Platform still rests on the pedestals.

1:30 am: No visible change.

Why the delay?

SFN coverage; I don't see any other live feed sources:
https://m.youtube.com/watch?v=YOgp45EJAQU
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: zubenelgenubi on 07/02/2022 06:08 am
2 am EDT: MLP still rests upon the pedestals.  No explanation for the delay, and no indication of when or if the rollback will proceed tonight.

2:48 am: SFN webcast host says that NASA says the delay has been to allow further inspections of the crawler and the MLP.  Rollback is still planned for this morning, but no estimated first motion time given.

MLP still rests on the pedestals--has not yet been jacked up for crawler transport.

VAB arrival would now be in the middle of the day.

After 3 am: I can't see any position changes.  The platform appears to still rest on the pedestals.

Circa 3:25 am:  I see some vehicles leaving the pad.  Preparing for lift and transport?
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: zubenelgenubi on 07/02/2022 08:02 am
Shortly before 4 am EDT: Jacking up the MLP off the launch pad pedestals has begun.

First motion of the crawler at ~4:12 am EDT = 08:12 UTC.

The stack is moving out of the pad spotlights and into relative darkness.

Most of the rollback will be in daylight.

The crawler will stop near the VAB perimeter to allow the Crew Access Arm to be swung and parked adjacent to the Orion craft--circa 11am EDT.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: zubenelgenubi on 07/02/2022 09:04 am
As the last predawn hour passes.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: zubenelgenubi on 07/02/2022 09:32 am
Please, would someone or someones continue to monitor the rollback and post occasional screencaps for the thread?  Thank you.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 10:13 am
https://twitter.com/NASAKennedy/status/1543146403865808897?cxt=HHwWgsC-7c7ereoqAAAA

SLS/Artemis 1: Running late because of unrelated snags, NASA's towering SLS moon rocket, perched atop an iconic crawler-transporter, began inching its way off pad 39B and back toward the Vehicle Assembly Building at 4:12am EDT (0812 UTC)

https://twitter.com/cbs_spacenews/status/1543160795147665410?cxt=HHwWhICwoaaktOoqAAAA

SLS/Artemis 1: Once back in the hangar, engineers will replace a suspect seal in a liquid hydrogen quick-disconnect fitting and begin readying the rocket for another trip back out to the pad and launch on its maiden flight in late August

https://twitter.com/cbs_spacenews/status/1543162066164482050?cxt=HHwWhIC8iaTutOoqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 10:24 am
https://twitter.com/SpaceflightNow/status/1543177359028879362?cxt=HHwWhIC85bjou-oqAAAA

NASA's Artemis 1 moon rocket is making its way back to the Vehicle Assembly Building as the sun rises over the Kennedy Space Center this morning
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 10:40 am
https://twitter.com/cbs_spacenews/status/1543180639142400002?cxt=HHwWhMC-xa-nveoqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 10:44 am
https://twitter.com/johnkrausphotos/status/1543186031092047872?cxt=HHwWgICx2Zzhv-oqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 11:04 am
Satellite image, acquired by Airbus' Pléiades Neo showing the Vehicle Assembly Building (VAB), the 39B shooting pitch and the 6.4-km Crawlerway that separates the two installations.
© Pléiades Neo, Airbus DS 2022
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 11:09 am
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 11:27 am
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 11:33 am
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: FutureSpaceTourist on 07/02/2022 12:37 pm
https://twitter.com/johnkrausphotos/status/1543210374937432064

Quote
With Launch Complex 39A — the past site of Apollo and Shuttle, the current home of Falcon, and the future launchpad of Starship — as a backdrop, NASA’s Space Launch System and Artemis I are seen returning to the Vehicle Assembly Building this morning.

johnkrausphotos.com/New
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 12:47 pm
NASA's Artemis 1 moon rocket passes the SpaceX Falcon 9 pad at 39A and the under construction Florida Starship launch facility.

https://twitter.com/SpaceflightNow/status/1543210631188434945?cxt=HHwWgsC-2ZH5yuoqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 01:19 pm
SLS/Artemis 1 (8:45am EDT, 1245 UTC): 4-and-a-half hours after getting underway, the crawler-transporter carries the SLS rocket  in front of launch complex 39A and makes a glacial right-hand turn, from south to southwest, to head for the VAB

https://twitter.com/cbs_spacenews/status/1543215807970279424?cxt=HHwWgICw3bumzeoqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 01:48 pm
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 02:20 pm

What livestream are those pictures from?
https://www.youtube.com/watch?v=YOgp45EJAQU
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 02:29 pm
A nice closeup... 8)
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/02/2022 02:36 pm
Looking marvellous!
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/02/2022 02:37 pm
0.9 miles from the VAB, according to the Spaceflight Now livestream.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/02/2022 02:38 pm
Looking marvellous!
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/02/2022 02:48 pm
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/02/2022 02:49 pm
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 02:49 pm
https://twitter.com/TGMetsFan98/status/1543241607348191235?cxt=HHwWhoC8iZiE2eoqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/02/2022 02:50 pm
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 02:56 pm
GO ARTEMIS !
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/02/2022 02:57 pm
We are going.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 03:00 pm
Another nice shot...
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/02/2022 03:02 pm
You can see the pad.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/02/2022 03:06 pm
Now half a mile (0.5 miles, 0.8 kilometres) from the VAB.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 03:11 pm
Now half a mile (0.5 miles, 0.8 kilometres) from the VAB.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 03:12 pm
https://twitter.com/SpaceflightNow/status/1543249419486871552?cxt=HHwWgIC-hfXK3OoqAAAA

The Space Launch System moon rocket is on the final stretch of its rollback to the Vehicle Assembly Building at the Kennedy Space Center.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/02/2022 03:12 pm
For those of you who are wondering, the truck in front of the ML that sprays water onto the ground in order to condition the pathway for the crushing weight of the CT with the SLS and the ML. The entire structure weights about 21.4 million pounds (9.7 million kg, 10,700 US tons, 9,700 metric tonnes), according to the Spaceflight Now livestream.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 03:15 pm
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/02/2022 03:16 pm
VAB in sight.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 03:17 pm
Now more than 7 hours since the first move...
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/02/2022 03:17 pm
Now more than 7 hours since the first move...
Could have flown from London to New York in that time.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 03:18 pm
https://twitter.com/spacecoast_stve/status/1543248448727777286?cxt=HHwWjIC8qbSS3OoqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 03:24 pm
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 03:30 pm
https://twitter.com/SpaceflightNow/status/1543252241011937285?cxt=HHwWisC8hZPv3eoqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: DanClemmensen on 07/02/2022 03:30 pm
Now more than 7 hours since the first move...
Could have flown from London to New York in that time.
That's lightly different movement problem  :)
On the other hand, Booster 7 could have waddled back and forth between the BC production site and launch site several times. I suspect SpaceX could have unstacked an SS from an SH and moved both the SS and the SH back to the production site and into hi bays in that time, which is a somewhat more analogous movement problem. We won't know until they actually do it.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 03:33 pm
TSMU. "Tail Service Mast Umbilical"

SLS/Artemis 1: Once back the Vehicle Assembly Building, one of the first items on the agenda will be to inspect a leaking hydrogen quick-disconnect fitting and replace a suspect seal in an umbilical at the base of the SLS core stage; we got a nice view of the area earlier today

https://twitter.com/cbs_spacenews/status/1543262449805189120?cxt=HHwWgICzvbDB4uoqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 03:41 pm
https://twitter.com/cbs_spacenews/status/1543260893290680322?cxt=HHwWhMC-xePm4eoqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 04:09 pm
On hold, now...
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 04:22 pm
CAA moving...
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 04:30 pm
The crew access arm is extending next to the Orion spacecraft on top of the Space Launch System, now holding position just outside the Vehicle Assembly

https://twitter.com/SpaceflightNow/status/1543268374112788480?cxt=HHwWgICzgZya5eoqAAAA

https://twitter.com/johnkrausphotos/status/1543259721708216321?cxt=HHwWgoCxycqi4eoqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 04:34 pm
CAA now in position...

https://twitter.com/cbs_spacenews/status/1543272188530376707?cxt=HHwWhoC-0Z_45uoqAAAA

SLS/Artemis 1: The Mobile Launcher's crew access arm has been rotated into position at the Orion capsule's hatch, an operation that can't be done inside the VAB because of interference with access platforms; a technician in a white hardhat looks on

https://twitter.com/TGMetsFan98/status/1543272701715939329?cxt=HHwWgoCwlY-W5-oqAAAA

Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 04:55 pm
CT moving again.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 05:03 pm
After 9 hours, in front of High Bay 3, now...

https://twitter.com/cbs_spacenews/status/1543283807838539776?cxt=HHwWgMCgncqc7OoqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 05:37 pm
https://twitter.com/NASASpaceflight/status/1543286769109635074?cxt=HHwWhMC4tfnI7eoqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/02/2022 05:44 pm
Back in the VAB and end of the SFN live

The rocket for NASA's Artemis 1 moon mission has rolled back inside the Vehicle Assembly Building after 4.2-mile (6.8-kilometer) journey from pad 39B at the Kennedy Space Center.

https://twitter.com/SpaceflightNow/status/1543291531444076545?cxt=HHwWgoC-yZPe7-oqAAAA
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Jim on 07/02/2022 05:57 pm
https://twitter.com/NASASpaceflight/status/1543286769109635074?cxt=HHwWhMC4tfnI7eoqAAAA

You mean this one?
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: FutureSpaceTourist on 07/02/2022 06:16 pm
https://twitter.com/johnkrausphotos/status/1543297245499559936

Quote
NASA's Space Launch System and Artemis I

johnkrausphotos.com/New/
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/02/2022 06:36 pm
How long did the rollback take?
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Vahe231991 on 07/02/2022 07:21 pm
How long did the rollback take?
The rollback took 7.5 hours to complete.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/02/2022 07:25 pm
What time did the rollback start and what time did it finish?
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: cplchanb on 07/02/2022 09:38 pm
0412 start, 1430 finish
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: jadebenn on 07/02/2022 10:22 pm
You mean this one?
Sorry, Jim. You can argue Cape Canaveral has more under its belt (and you'd be completely right), but KSC is the one people recognize.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/03/2022 05:38 am
0412 start, 1430 finish
(My 200th post!) Overall rollback time: 10 hours 18 minutes.
Could have flown from London to San Francisco in that time.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/03/2022 07:00 am
Also, does anyone know as to what date rollout for launch looks like?
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Jim on 07/03/2022 01:01 pm
You mean this one?
Sorry, Jim. You can argue Cape Canaveral has more under its belt (and you'd be completely right), but KSC is the one people recognize.

Not really.  Cape Canaveral has more name recognition.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Jim on 07/03/2022 01:02 pm
Also, does anyone know as to what date rollout for launch looks like?

No.  You have been following this thread, correct?   The information is in it.

https://forum.nasaspaceflight.com/index.php?topic=56107.msg2380403#msg2380403

When somebody knows it will be posted.  No need to ask.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Overwatchfan123 on 07/03/2022 02:53 pm
Also, does anyone know as to what date rollout for launch looks like?

No.  You have been following this thread, correct?   The information is in it.

https://forum.nasaspaceflight.com/index.php?topic=56107.msg2380403#msg2380403

When somebody knows it will be posted.  No need to ask.
OK, fine.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: oldAtlas_Eguy on 07/03/2022 09:11 pm
List of variables that have to be quantified to be able to determine the roll out date for Launch:

- work platform: emplacement and later stowage. This should be easily quantifiable if all the access points are known. It is when additional platforms are determined to be needed after trying to perform a task that can cause a variation as well as when an issue occurs that prevents temporarily the emplacement or stowage. These two unknowns can cause an almost cascading problem in the roll-out schedule.

- identified troubleshooting and fixes. These items are now mostly a guess until work on them get started which will determine more about the amount of work and time involved in completing them. These items are highly variable currently in the amount of time needed.

- pyro install. This should be already well defined with a quantity including some schedule pad (hopefully). This task cannot be accomplished simultaneously with other tasks because of minimal personnel in bay requirements regarding pyro devices.

- FTS final setup and certification. This also should be already well defined with a quantity including some schedule pad. This is the last task before the button up which is the platform stowage that are needed to do the FTS tasks.

- and finally the last consideration and variable is to determine which launch period can be reached where a roll-out can be done at 3 days to 10 days prior to the beginning of the period. This item is the one that determines if the vehicle sits and waits in the VAB prior to doing the FTS cert task or moves ahead immediately to get out to the pad. Launch periods start dates occur every 28 days. The last for only 14/15 days. Enough days have to be still available to launch in to take in the possibility of minor issues or weather. The first launch day is approximately 10 days after roll-out due to all the setup tasks that have to be completed prior to being able to launch.

If the unknown tasks/issues resolutions duration are in total less than 21 days then the Aug/Sep launch period is achievable. But the last unknown unknown is the weather. August is one of the 2 highest tropical cyclone weather months along with the other which is September.

All of this at the moment is why NASA will not set a roll-out date until well into the troubleshoot/repair tasks so that a defined remaining work to be accomplished before roll-out is established.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: jadebenn on 07/04/2022 12:06 am
Not really.  Cape Canaveral has more name recognition.
I'll give you the name, but I don't think it's more recognizable to the public. Certainly not visually.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Jim on 07/04/2022 01:40 am
Not really.  Cape Canaveral has more name recognition.
I'll give you the name, but I don't think it's more recognizable to the public. Certainly not visually.

Nah, not that either
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: jadebenn on 07/04/2022 05:41 am
Nah, not that either
Right. Not like the VAB, LCC, or pads A and B are the only pieces of ground infrastructure a layman would even have a chance at recognizing. Those things have absolutely no pop cultural presence at all compared to the storied and infallible cape. ::)
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: russianhalo117 on 07/04/2022 06:12 am
Nah, not that either
Right. Not like the VAB, LCC, or pads A and B are the only pieces of ground infrastructure a layman would even have a chance at recognizing. Those things have absolutely no pop cultural presence at all compared to the storied and infallible cape. ::)
Well going by the original naming which I still agree by everything is just Cape Canaveral because they are on a Cape called Canaveral.

That settles that off topic debate in the wrong thread.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Vahe231991 on 07/08/2022 03:33 pm
https://www.nasaspaceflight.com/2022/07/artemis-1-wdr-review/
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 07/08/2022 05:51 pm

Work Continues to Prepare Artemis I Moon Rocket for Launch   (https://blogs.nasa.gov/artemis/2022/07/08/work-continues-to-prepare-artemis-i-moon-rocket-for-launch/)


Since the Space Launch System (SLS) and Orion arrived back at the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida on July 2, teams extended the access platforms surrounding the rocket and spacecraft to perform repairs and conduct final operations before returning to launch pad 39B for the Artemis I mission. 


Technicians are working to inspect, fix, and check out equipment associated with a seal on the quick disconnect of the tail service mast umbilical that was identified as the source of a hydrogen leak during the wet dress rehearsal test that ended June 20. Engineers have disconnected the umbilical and are in the process of examining the area where they will replace two seals on the quick disconnect hardware. Working in tandem with those repairs, engineers also completed the last remaining engineering test that is part of the integrated testing operations in the VAB. 


Teams also performed additional planned work on aspects of the rocket and spacecraft. Engineers swapped out a computer on the Interim Cryogenic Propulsion Stage called the Inertial Navigation and Control Assembly unit that was used during wet dress rehearsal activities with the one that will be used for flight and will test the unit next week. The newly installed flight unit includes freshly calibrated inertial navigation sensors and updated software to guide and navigate the upper stage during flight. 


Technicians also activated several batteries for the rocket elements, including for the solid rocket boosters and the ICPS. The batteries on the core stage will be activated in the coming weeks, and all the batteries will then be installed. The batteries provide power for the rocket elements during the final portion of the countdown on launch day and through ascent. 


Engineers also charged the batteries for the secondary payloads located on the Orion stage adapter and will work to install payloads inside the Orion spacecraft in the coming weeks. 
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: cplchanb on 07/09/2022 12:37 am
https://twitter.com/NASAGroundSys/status/1545394113603829761?s=20&t=YhSNSNL4qtbM1d-Vbl75zw

New gif from nasa on the rs-25s gimballing
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Conexion Espacial on 07/15/2022 07:12 pm

Progress Continues Toward Artemis I Launch  (https://blogs.nasa.gov/artemis/2022/07/15/progress-continues-toward-artemis-i-launch/)

Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, technicians continue to prepare the Space Launch System rocket and Orion spacecraft for Artemis I. 


During work to repair the source of a hydrogen leak, engineers identified a loose fitting on the inside wall of the rocket’s engine section, where the quick disconnect for the liquid hydrogen umbilical attaches. The component, called a “collet,” is a fist-sized ring that guides the quick disconnect during assembly operations. Teams will repair the collet by entering the engine section in parallel with other planned work for launch preparations. Technicians have replaced the seals on the quick disconnect of the tail service mast umbilical and will reattach the umbilical plate once the loose collet is addressed. 


NASA continues to target the late August launch period and will identify a specific target launch date after engineers have examined the collet.


Technicians continue work associated with battery activations, and plan to turn on the core stage batteries this weekend, before they are installed on the rocket. Next up, teams will start the flight termination systems operations, which include removing the core stage and booster safe and arm devices for calibration and removing and replacing the command receiver decoders with the flight units. The safe and arm devices are a manual mechanism that put the flight termination system in either a “safe” or “arm” configuration while the command receiver decoders receive and decode the command on the rocket if the system is activated.


Meanwhile on the Orion spacecraft, teams installed a technology demonstration that will test digital assistance and video collaboration in deep space. Engineers are also conducting powered testing on the crew module and European service module heaters and sensors. 
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Vahe231991 on 07/16/2022 12:43 am


During work to repair the source of a hydrogen leak, engineers identified a loose fitting on the inside wall of the rocket’s engine section, where the quick disconnect for the liquid hydrogen umbilical attaches. The component, called a “collet,” is a fist-sized ring that guides the quick disconnect during assembly operations. Teams will repair the collet by entering the engine section in parallel with other planned work for launch preparations. Technicians have replaced the seals on the quick disconnect of the tail service mast umbilical and will reattach the umbilical plate once the loose collet is addressed. 
 (https://blogs.nasa.gov/artemis/2022/07/15/progress-continues-toward-artemis-i-launch/)
Now this explains the LH2 leak seen at the QD of the SLS core stage during the final Wet Dress Rehearsal test on June 20. Nevertheless, NASA personnel continued the WDR#4 test because it didn't find the LH2 leak at the QD serious enough.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: yg1968 on 07/20/2022 12:26 am
https://twitter.com/JimFree/status/1549524143103696897
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: centaurinasa on 07/20/2022 09:58 am
https://twitter.com/NASA/status/1549525499034083330?cxt=HHwWhICxxenOgoErAAAA

https://www.youtube.com/watch?v=p3CXCgXONc4
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: jadebenn on 07/20/2022 02:52 pm
Time to see if it's LP25 or LP26.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Khadgars on 07/20/2022 02:56 pm
Time to see if it's LP25 or LP26.

Are those launch opportunities?
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: jadebenn on 07/20/2022 02:59 pm
Are those launch opportunities?
They're the launch periods that contain launch opportunities. LP25 is late August - early September, LP26 is mid September - early October.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Khadgars on 07/20/2022 03:20 pm
Are those launch opportunities?
They're the launch periods that contain launch opportunities. LP25 is late August - early September, LP26 is mid September - early October.

That's what I thought, thanks for confirming.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: FutureSpaceTourist on 07/20/2022 03:33 pm
New thread started for Artemis I launch, now there’s a specific target date:

https://forum.nasaspaceflight.com/index.php?topic=56782.0

In the "Missions to the Moon" sub-forum.
Title: Re: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)
Post by: Chris Bergin on 08/17/2022 02:00 am
Rolling.
https://twitter.com/NASASpaceflight/status/1559721660839772160

https://www.youtube.com/watch?v=hBRt1MOEUys