Author Topic: SCRUB: Delta IV-H - EFT-1 Orion - Launch and Mission UPDATES (Read 252910 times)

Steven Pietrobon · « **Reply #340 on:** 12/04/2014 12:48 pm »

Problems with port and core valve cycling. LOX valves are OK. The problems are with the LH2 valves.

Steven Pietrobon · « **Reply #341 on:** 12/04/2014 12:51 pm »

A little bit of camera shake in this shot.

Antares · « **Reply #342 on:** 12/04/2014 12:53 pm »

Stream I'm listening to (someone broadcasting from wherever NASA PAO is) is not optimistic.

MATTBLAK · « **Reply #343 on:** 12/04/2014 12:54 pm »

Quote from: Steven Pietrobon on 12/04/2014 12:48 pm

Problems with port and core valve cycling. LOX valves are OK. The problems are with the LH2 valves.

'Sticky' valves from a long pre-launch cold soak?

Steven Pietrobon · « **Reply #344 on:** 12/04/2014 12:56 pm »

49 minutes left in window.

clongton · « **Reply #345 on:** 12/04/2014 12:57 pm »

Still Holding due to Winds Aloft

Steven Pietrobon · « **Reply #346 on:** 12/04/2014 12:58 pm »

Flying over Orion. Heard a beep there.

Chris Bergin · « **Reply #347 on:** 12/04/2014 12:59 pm »

That's a rather large bird heading to the pad.

Steven Pietrobon · « **Reply #348 on:** 12/04/2014 01:01 pm »

Discussions still ongoing with centre and left LH2 fill and drain valves.

44 minutes left in window.

Antares · « **Reply #349 on:** 12/04/2014 01:02 pm »

Quote from: MATTBLAK on 12/04/2014 12:54 pm

Quote from: Steven Pietrobon on 12/04/2014 12:48 pm
Problems with port and core valve cycling. LOX valves are OK. The problems are with the LH2 valves.
'Sticky' valves from a long pre-launch cold soak?

Concur.

antriksh · « **Reply #350 on:** 12/04/2014 01:04 pm »

Steven Pietrobon · « **Reply #351 on:** 12/04/2014 01:04 pm »

Pressurise to 35 psi for two minutes to help solve valve problem for all three CBC hydrogen tanks. Vent down and then cycle again.

ZachS09 · « **Reply #352 on:** 12/04/2014 01:05 pm »

These three holds kind of remind me of the NROL-15 launch countdown. I hope the results for the fourth try are the same as what happened back in 2012.