Artemis Moon Program

We’re GOing in 1 more day!
Spending my morning at @NASAKennedy with a few @NASA_Astronauts candidates before #Artemis I launch. This is what the future of space exploration looks like!
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https://twitter.com/x/status/1563892084112769025
View: https://twitter.com/Dr_ThomasZ/status/1563892084112769025


Overnight, we powered-up @NASA_SLS’s core stage components for the #Artemis I launch, including the avionics boxes located inside the core stage. The boxes are connected to various sensors and flight computers to command and control the rocket during tanking, liftoff, and ascent.
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https://twitter.com/x/status/1563907893610643456
View: https://twitter.com/JimFree/status/1563907893610643456?cxt=HHwWgIC8wa_8jrQrAAAA


This morning I had my first look at the fully assembled #Artemis1 rocket - I’m speechless! Years of dreams and exceptional hard work at @NASA have paid off - WE ARE GOING! Launch window to the Moon opens at 08:33 ET tomorrow! Follow along:
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https://twitter.com/x/status/1563913704948768771
View: https://twitter.com/Astro_Jessica/status/1563913704948768771?
 
https://twitter.com/x/status/1563889901019582465
View: https://twitter.com/sciguyspace/status/1563889901019582465


Interesting note from the SLS briefing this morning. If the count reaches main engine ignition, at T-6.8 seconds, and there is a scrub for any reason they will not be able to recycle. Rocket will need to go back to VAB for an engine swap.
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https://twitter.com/x/status/1563891092566818816
View: https://twitter.com/sciguyspace/status/1563891092566818816


Why is this? Because after engine ignition there are a bunch of inspections needed before firing them again. Easier to swap out RS-25s. Working with hydrogen is hard.
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https://twitter.com/x/status/1563896611687862273
View: https://twitter.com/waynehale/status/1563896611687862273


Use the Shuttle engines, get the Shuttle constraints
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Regarding the above the Starship stack doesn’t have the same limitations as above and can recycle.
 
SLS/Artemis 1: NASA verifies this leak is similar to one that stopped the rocket's first practice countdown earlier this year; the hydrogen team wants to resume slow fill and verify the concentration of hydrogen in a tail mast "purge can" remains stable (1/2)
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https://twitter.com/x/status/1564152091681202177
View: https://twitter.com/cbs_spacenews/status/1564152091681202177?cxt=HHwWgoC99ciC_rQrAAAA


SLS/Artemis 1: If so, they will resume fast fill, loading LH2 at a 10x faster rate, and see if the concentration goes back up at the higher pressure; if it goes past 4% they will stop fast fill, revert, and do more troubleshooting (2/2)
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https://twitter.com/x/status/1564153169654996992
View: https://twitter.com/cbs_spacenews/status/1564153169654996992?cxt=HHwWgICzuajB_rQrAAAA
 
www.nasaspaceflight.com

Artemis 1 vehicle heads back to VAB while NASA discusses what to do next - Page 2 of 2 - NASASpaceFlight.com

Hydrogen leak troubleshooting will resume inside the VAB Once the decision was made, EGS and…
www.nasaspaceflight.com www.nasaspaceflight.com
“When we transitioned to fast fill… you will see an increase in pressure as part of that load operation, [and] we did detect a leak on the Tail Service Mast on something that we call the purge can or the purge canister. It’s actually on the back of the ground-side plate. We did see a leak there.”
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The Economist takes a dim view of SLS and doesn't need to look far to find the culprit.

www.economist.com

NASA’s newest rocket is a colossal waste of money

Launching people into space should be left to private industry
www.economist.com www.economist.com

www.economist.com

NASA’s Space Launch System is yesterday’s rocket

It is powered by yesterday’s technology and brought about by yesterday’s thinking
www.economist.com www.economist.com

In his new book, “The Crux”, Richard Rumelt, a professor of business strategy, writes about a conversation he once had with an air-force colonel. What, Mr Rumelt asked, is the perfect fighter jet? The colonel replied: “The perfect design would have contractors in each state and a part made in each congressional district.” The tale is told after Mr Rumelt has described the waste and incoherence of NASA’s Space Shuttle programme—something he blames squarely on Congress.

In other words, if pigs don't fly, pork does.
 
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Rhinocrates said:
The Economist takes a dim view of SLS and doesn't need to look far to find the culprit.

www.economist.com

NASA’s newest rocket is a colossal waste of money

Launching people into space should be left to private industry
www.economist.com www.economist.com

In his new book, “The Crux”, Richard Rumelt, a professor of business strategy, writes about a conversation he once had with an air-force colonel. What, Mr Rumelt asked, is the perfect fighter jet? The colonel replied: “The perfect design would have contractors in each state and a part made in each congressional district.” The tale is told after Mr Rumelt has described the waste and incoherence of NASA’s Space Shuttle programme—something he blames squarely on Congress.

In other words, if pigs don't fly, pork does.
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The write as if this discussion hasn’t been had about million times in the past. Come back to me when they actually have something new to say rather than reheating the same old discussion for the hundredth time.
 
According to ...
phys.org

Fuel leaks threaten to delay launch of new NASA moon rocket (Update)

Fuel leaks during final liftoff preparations threatened to postpone the launch of NASA's mighty new moon rocket Monday morning on its shakedown flight with three test dummies aboard.
phys.org phys.org
... the H2 leak is not going away and so they've rolled back the launch until Friday...

This may be an editing slip, to which PhysOrg are prone, but it could well be 'Friday.'

Can any-one confirm either way ??

D'uh, part of me wants to see SLS 'fly clean', another part wants to see this un-crewed test fail dramatically, putting an end to the entire unhappy, uber-bloated program...
 
Nik said:
According to ...
phys.org

Fuel leaks threaten to delay launch of new NASA moon rocket (Update)

Fuel leaks during final liftoff preparations threatened to postpone the launch of NASA's mighty new moon rocket Monday morning on its shakedown flight with three test dummies aboard.
phys.org phys.org
... the H2 leak is not going away and so they've rolled back the launch until Friday...

This may be an editing slip, to which PhysOrg are prone, but it could well be 'Friday.'

Can any-one confirm either way ??

D'uh, part of me wants to see SLS 'fly clean', another part wants to see this un-crewed test fail dramatically, putting an end to the entire unhappy, uber-bloated program...
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None of the above is true. Please do not post disinformation in this thread. There are issues but not one listed above which is resolved.
 
Line of ice that had formed on intertank on exterior of core stage. Concluded that it formed along a line of air that had been chilled by the tank in a crack in the foam, but not into the tank. A stress crack in the foam. Would see an offset if there was a structural crack. Have a history of this with Space Shuttle tank. Called cryopumping.
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https://twitter.com/x/status/1564217895156080640
View: https://twitter.com/sciguyspace/status/1564217895156080640


Rumor is that today's a scrub. No confirmation yet.
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https://twitter.com/x/status/1564218851537068033
View: https://twitter.com/wapodavenport/status/1564218851537068033


NASA VIP guests are being told there may be a scrub for the Artemis I launch. Unofficial, though.
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https://twitter.com/x/status/1564218987927445504
View: https://twitter.com/joroulette/status/1564218987927445504


I'm hearing mission management teams have opted to call off today's launch attempt. Nothing officially stated by NASA yet
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While we are waiting, on another note from earlier this month:
japannews.yomiuri.co.jp

Japan, U.S. rocketing ahead with lunar infrastructure plans

The U.S.-led Artemis Program is shooting for the moon. The international lunar exploration program has a broad range of objectives, including the return of humans to the surface of Earth’s closest celestial neighbor for the first time since the Apollo 17 mission in 1972. Research and development...
japannews.yomiuri.co.jp japannews.yomiuri.co.jp

1661774633804.png
 
Still holding at T-40 minutes. Standing by for go-forward plan from cryo team. Launch Director is on standby. The LH2 bleed was something they wanted test in the wet-dress rehearsals, but could not due to a hydrogen leak.
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If NASA cannot solve the issue with Artemis 1 then they should abort the launch and try again on Friday.
 

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