Author Topic: Artemis I Pre-Launch Testing at LC-39B (Leading up to and including all WDR's)  (Read 122428 times)

Offline Overwatchfan123

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The transition to fast fill of the core stage is about 10 minutes away.
I've been a space aficionado since 2008. I love space.
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Offline centaurinasa

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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
« Last Edit: 06/20/2022 03:10 pm by centaurinasa »
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Offline centaurinasa

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« Last Edit: 06/20/2022 03:12 pm by centaurinasa »
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Offline centaurinasa

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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
To boldly go where no human has gone before !

Offline centaurinasa

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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
« Last Edit: 06/20/2022 03:33 pm by centaurinasa »
To boldly go where no human has gone before !

Offline centaurinasa

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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
« Last Edit: 06/20/2022 03:36 pm by centaurinasa »
To boldly go where no human has gone before !

Offline centaurinasa

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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
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Offline centaurinasa

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Right now, LH2: 20 %, LOX: 46%
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Offline centaurinasa

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Next main event: second (ICPS) stage tanking...  8)
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Offline Vahe231991

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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.
« Last Edit: 06/23/2022 03:00 am by zubenelgenubi »

Offline centaurinasa

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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
« Last Edit: 06/20/2022 04:32 pm by centaurinasa »
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Offline centaurinasa

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Offline cplchanb

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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?

Offline centaurinasa

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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
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Offline 2024MoonShot

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Hydrogen is lighter and less denser than oxygen thus it fills at a faster rate.
« Last Edit: 06/20/2022 04:43 pm by 2024MoonShot »

Offline centaurinasa

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UPDATE: LOX now 80% full, LH2 holding at 100% full and in replenish mode.

https://twitter.com/NASAGroundSys/status/1538925379557150720?cxt=HHwWgMCyhdWertsqAAAA
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Offline centaurinasa

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Waiting for ICPS tanking, now...
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Offline SWGlassPit

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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
« Last Edit: 06/20/2022 05:17 pm by SWGlassPit »

Offline centaurinasa

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Some venting...
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Offline centaurinasa

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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
« Last Edit: 06/20/2022 05:06 pm by centaurinasa »
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