Author Topic: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)  (Read 123055 times)

Offline hektor

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 public "feeling"

I am in Europe.  ;D
« Last Edit: 06/20/2022 08:31 pm by hektor »

Offline centaurinasa

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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
To boldly go where no human has gone before !

Offline centaurinasa

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Offline centaurinasa

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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
« Last Edit: 06/20/2022 09:19 pm by centaurinasa »
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Offline centaurinasa

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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
« Last Edit: 06/20/2022 09:47 pm by centaurinasa »
To boldly go where no human has gone before !

Offline centaurinasa

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UPDATE: All four @NASA_SLS propellant tanks are now fully fueled and in replenish.

https://twitter.com/NASAGroundSys/status/1539001703818743814?cxt=HHwWjMCyjan50NsqAAAA
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Offline centaurinasa

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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
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Offline centaurinasa

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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
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Offline Vahe231991

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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.

Offline centaurinasa

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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
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Offline centaurinasa

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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
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Offline centaurinasa

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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
« Last Edit: 06/20/2022 11:08 pm by centaurinasa »
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Online DaveS

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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.
« Last Edit: 06/20/2022 11:15 pm by DaveS »
"For Sardines, space is no problem!"
-1996 Astronaut class slogan

"We're rolling in the wrong direction but for the right reasons"
-USA engineer about the rollback of Discovery prior to the STS-114 Return To Flight mission

Offline centaurinasa

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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

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Offline centaurinasa

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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
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Offline centaurinasa

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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
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Offline centaurinasa

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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
« Last Edit: 06/20/2022 11:31 pm by centaurinasa »
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Offline centaurinasa

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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
To boldly go where no human has gone before !

Offline centaurinasa

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To boldly go where no human has gone before !

Offline centaurinasa

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To boldly go where no human has gone before !

 

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