LH2 back in fast-fill. After allowing the LH2 seal to warm back up and very slowly increasing the pressure which in turn controls the flow-rate, the leak has decreased significantly from the previously detected 7% concentration of H2 to 0.5% concentration which is well within the Launch Commit Criteria (LCC). LH2 is now at 29% filled. They're right now at the normal pressure that is used for fast-fill and where they saw the leak earlier and everything is holding.
Updates SLS Updates
- Thread starter N_Molson
- Start date
As the LH2 vent valve was closed on the Core Stage to allow the engine bleed kick start procedure to be put in effect, the LH2 TSMU leak has increased to 1%. It seems to follow the pressure as the engineers thought. Pressure has now peaked and the vent valve is cycling as it should and the leaked topped out at 3.4%, which while high, is within the LCC of 4%.
LH2 now in replenish, so that completes Core Stage tanking. ICPS tanking is on hold for now while the team is discussing the forward path. After the engine bleed kick start procedure was completed and LH2 fast-fill resumed with maximum pressure in storage sphere, the max concentration seen was only 0.5% which is very manageable.
GLS
Well-known member
Core Stage LH2 pre-pressurization test is now underway after completing ICPS LH2 loading. This is the final test of the day and will last for approximately one hour. ICPS LOX loading is still in progress. Once the Core Stage LH2 pre-pressurization test is complete, the tanking test will conclude and the vehicle will be detanked and safed.
Correction: The leak that was observed during the Core Stage LH2 pre-press test was at the 4" Engine Bleed line QD, not 8" Fill/Drain QD, it was stable at the previously reported 0.5% as it was isolated during the test.
The ICPS LH2 loading has now been dialed in so the Launch Director has given the direction to the GLS to cut-off the countdown and to begin the detanking and safeing activities.
This will conclude the tanking test.
This will conclude the tanking test.
GLS
Well-known member
It never rains, but it pours...
If they try on the 27th and for some reason end up not launching, IMO it seems a bit too tight to rollback in time to avoid the storm.... so my guess is they rollback and it's an October launch.
If they try on the 27th and for some reason end up not launching, IMO it seems a bit too tight to rollback in time to avoid the storm.... so my guess is they rollback and it's an October launch.
GLS
Well-known member
steph
Well-known member
I'd say, with a hurricane churning up the winds nearby, there's a good chance the launch windows may not 'work' due to weather, even if everything else does work. Roll it back to VAB, change the batteries and launch in October or November. If they'd get another anomaly on the pad, people would completely lose interest
GLS
Well-known member
TheShuttleExperience
Well-known member
Maybe I'm not up to date but I did not yet even see any lunar lander being developed and tested. I guess it would be more like 2030+.
When Alan Shepard got his medal J. F. K. said "societies that risk much gain much." Doesn't seem to be the philosophy these days. Today people are more worried about environmentalism and safety rather than actually get something really on its way...
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You said it! We need today the kind of NASA leadership that went from zero to boots on the moon in nine years.
