The Artemis 1 wet dress rehearsal, which resumes Tuesday (April 12), won't feature a fueling of the moon rocket's upper stage.
, but in a modified format: They will no longer fuel the SLS upper stage, filling the core stage's tanks only.
The tanking activity will take place on Thursday , as will several launch countdowns and other key steps. If all goes according to plan, everything will build toward a simulated"liftoff time" of 2:40 p.m. EDT , after which the team will detank the core stage and perform other wind-down activities. "I'm very confident that we're gonna have a good test on Thursday with the modified procedures, and I think we'll learn a lot," John Blevins, SLS chief engineer at NASA's Marshall Space Flight Center in Alabama, said during a call with reporters today.
Artemis 1 team members won't get data about upper-stage propellant loading, but they'll gather a lot of other information about SLS and Orion. And they've already met many of their wet dress objectives, thanks to the aborted efforts earlier this month, agency officials said during today's call. And discovering a faulty valve is hardly a shock; Artemis 1 will be the first-ever flight for the SLS and just the second for Orion, so some issues are bound to crop up during prelaunch checks, team members said.
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