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Artemis Launch

JSmith

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kschmit2

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still holding the countdown at T -40 minutes for an engine issue with RS25
 

kschmit2

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Tank integrity is intact (no crack), but liquid oxygen is still causing trouble:

"While liquid oxygen loading into the interim cryogenic propulsion stage continues and core stage tanks continue to be replenished with propellants, engineers are troubleshooting an issue conditioning one of the RS-25 engines (engine 3) on the bottom of the core stage. Launch controllers condition the engines by increasing pressure on the core stage tanks to bleed some of the cryogenic propellant to the engines to get them to the proper temperature range to start them. Engine 3 is not properly being conditioned through the bleed process, and engineers are troubleshooting." source: https://blogs.nasa.gov/artemis/

Launch window is slowly closing.

"NASA has a two-hour window in which to launch Artemis 1 on Aug. 29. That means the launch could occur anytime between 8:33 a.m. and 10:33 a.m. EDT (1233-1433 GMT)" source: https://www.space.com/artemis-1-sls-rocket-moon-launch-what-time

"There are two backup launch days in Artemis 1's current flight window: Friday, Sept. 2 and Monday, Sept. 5. Both dates have their own extended launch windows.

If NASA is forced to go for the Sept. 2 launch date, the Artemis 1 SLS rocket will launch at 12:48 p.m. EDT (1748 GMT) and would have a two-hour window to get off the ground. NASA would have to accept a shorter mission, 39 days instead of the 42-day flight an Aug. 29 liftoff allows for, if the agency opts for this launch date. It would splash down in the ocean on Oct. 11 instead of the original Oct. 10.

The Sept. 5 launch date calls for a liftoff at 5:12 p.m. EDT (2212 GMT). The launch window for this date is a bit shorter, 90 minutes as opposed to two hours, but does allow NASA to pursue a longer 42-day flight. Landing would occur on Oct. 17."
source: https://www.space.com/artemis-1-sls-rocket-moon-launch-what-time
 
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Blumlein 88

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Yes, things aren't sounding good for a launch today.

Here is one of the live feeds. They do have commentary every few minutes.

 

Blumlein 88

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They just scrubbed the launch for today. Too BAD!

Wonder what they do with all that fuel already on board?
 

RayDunzl

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Wonder what they do with all that fuel already on board?

They have to take the cold fuel/oxidizer off... else as it warms it pressurizes and would likely explode the tanks.

It is termed "offloading".

Liquid Oxygen is -297F, above that it wants to boil.

I suspect it goes back to storage, but I can't find an authoritative answer to that.

LOX is kinda cheap, so maybe it gets wasted.

NASA doesn't make it, they buy from a commercial company.
 
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Berwhale

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Vini darko

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They have to take the cold fuel/oxidizer off... else as it warms it pressurizes and would likely explode the tanks.

It is termed "offloading".

Liquid Oxygen is -297F, above that it wants to boil.

I suspect it goes back to storage, but I can't find an authoritative answer to that.

LOX is kinda cheap, so maybe it gets wasted.

NASA doesn't make it, they buy from a commercial company.
I was trying to find that answer too. Even downloaded the pdf from nasa about the vehicle and mission.
 

Peterinvan

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WHAT A WASTE OF SCARCE RESOURCES!

"We need to stay ahead of the Chinese"
"We need to prepare for putting a human on Mars"
"We need to put on a distraction for the voters"

“Mars ain’t the kind of place to raise your kids.
In fact, it’s cold as hell.
And there’s no one there to raise them if you did.”
— “Rocket Man” performed by Elton John
with lyrics by Bernie Taupin
 

BinkieHuckerback

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WHAT A WASTE OF SCARCE RESOURCES!

"We need to stay ahead of the Chinese"
"We need to prepare for putting a human on Mars"
"We need to put on a distraction for the voters"

“Mars ain’t the kind of place to raise your kids.
In fact, it’s cold as hell.
And there’s no one there to raise them if you did.”
— “Rocket Man” performed by Elton John
with lyrics by Bernie Taupin
…seriously? You base human scientific activity on an Elton John song?
 

Peterinvan

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…seriously? You base human scientific activity on an Elton John song?
Sorry you don't see the humour.

I am trying to say that human scientific activity should be focused on making this planet safe and healthy for our grandkids, and their grandkids.

Rocket science seems to be a lower priority right now.
 

BinkieHuckerback

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Sorry you don't see the humour.

I am trying to say that human scientific activity should be focused on making this planet safe and healthy for our grandkids, and their grandkids.

Rocket science seems to be a lower priority right now.
Do both. There's more than enough 'money' and resources about. There may be discoveries from space exploration that enhance life on this little planet.
 

Peterinvan

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Do both. There's more than enough 'money' and resources about. There may be discoveries from space exploration that enhance life on this little planet.
I am not sure about your assumption that there is enough money around.

The $8 trillion dollars that was "printed" over the past few years is now shown to be causing inflation and likely recession or even a depression. Politicians must have known this as there is some historical evidence.

Who pays? The consumer and homeowner today. Our grandkids tomorrow.

 

BinkieHuckerback

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I am not sure about your assumption that there is enough money around.

The $8 trillion dollars that was "printed" over the past few years is now shown to be causing inflation and likely recession or even a depression. Politicians must have known this as there are some historical evidence.

Who pays? The consumer and homeowner today. Our grandkids tomorrow.

Of course there's enough 'money' around. The people who pay are the ones with the 'money'. Don't blame 'politicians'. Space exploration can go hand in hand with making peoples lives better.
 
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