Author Topic: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)  (Read 122306 times)

Offline centaurinasa

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CS Tanking status.
« Last Edit: 06/20/2022 05:18 pm by centaurinasa »
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Offline centaurinasa

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We are now in Core stage LOX and LH2 replenish.
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Offline centaurinasa

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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
« Last Edit: 06/20/2022 05:58 pm by centaurinasa »
To boldly go where no human has gone before !

Offline Robert_the_Doll

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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
« Last Edit: 06/20/2022 09:36 pm by Robert_the_Doll »

Offline centaurinasa

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UPDATE: The @NASA_SLS liquid oxygen core stage tank is now in stable replenish.


https://twitter.com/NASAGroundSys/status/1538941718300598272?cxt=HHwWgICxldrVtdsqAAAA
To boldly go where no human has gone before !

Offline centaurinasa

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Team is dealing on some issue with a leak on LH2 quick disconnect
To boldly go where no human has gone before !

Offline centaurinasa

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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
« Last Edit: 06/20/2022 06:16 pm by centaurinasa »
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Offline centaurinasa

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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
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Offline centaurinasa

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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
To boldly go where no human has gone before !

Offline centaurinasa

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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
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Offline centaurinasa

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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

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Online Vahe231991

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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.
« Last Edit: 06/23/2022 03:19 am by zubenelgenubi »

Offline AstroWare

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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.

Offline centaurinasa

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Some closeup of the Core Stage...
To boldly go where no human has gone before !

Offline centaurinasa

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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
To boldly go where no human has gone before !

Offline FutureSpaceTourist

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« Last Edit: 06/20/2022 07:50 pm by FutureSpaceTourist »

Offline tea monster

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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
« Last Edit: 06/20/2022 07:59 pm by tea monster »

Offline centaurinasa

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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
« Last Edit: 06/20/2022 08:04 pm by centaurinasa »
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Offline hektor

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I have the feeling that this hold is going to last longer than 30 minutes.

Offline Hog

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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"?
Paul

 

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