/sci/ - Science & Math

Second prevalve issue delays completion of SLS Core Stage Green Run campaign
>A problem with another one of the eight prevalves in the Artemis 1 Core Stage for NASA’s Space Launch System (SLS) has postponed a second test-firing to wrap up the Green Run campaign. The SLS Program’s first flight article has been installed in the B-2 Test Stand at the Stennis Space Center in southern Mississippi since January 2020
>This is the second problem with a prevalve during the Core Stage’s Green Run test campaign that began at the beginning of 2020. The first problem was with the liquid hydrogen (LH2) prevalve for engine number four.
>Fixing the problem with this second balky prevalve will take some time because engineers needed to get “under the hood” access to the vehicle, which was already closed out for the Hot-Fire test when the new problem was discovered. In order to get hands on the prevalve, work access needed to be re-established.
>If this new issue is a recurrence of the similar problem with the Core Stage Main Propulsion System prevalves seen last October, it may have other implications if there’s a generic issue with the prevalve hardware itself. The valves are critical to the safe operation of the stage; they must behave within specifications, fully opening and closing within time limits to ensure proper engine ignition and shutdown conditions.
>NASA said the troubleshooting of the LOX prevalve would help to identify repairs needed. A new date will depend in part on how extensive and invasive the repair work is.
Special tooling was designed, fabricated, and employed to perform the first prevalve repair and could be used again; however, work access to the LOX prevalves may be different than the LH2 prevalves.
https://www.nasaspaceflight.com/2021/02/prevalve-issue-delays-sls-green-run/

https://youtu.be/p-RfuhnZzKc

Lefties hate SpaceX because they prove that the future is not my picture which means they won't be in it.


We'll be able to send 100 people to Mars for less money than two seats on the shuttle for a ride to the ISS, and they still piss and moan about the "rich people" going to space.

>>12641539
>Source: my Asshole
NASA has done no innovation since the 90s, if it were not for SpaceX, they would still be paying russians to take americans to the space.
Retard.

>>12628165

>>12584493
>The diversity hires at NASA can't design an unmanned rocket anymore, what makes you think they'd try manned launches

>>12577200
>money will be given to non whites, women and other social causes
It is already

>>12566498
OK fine, post the intellectual achievements of Sheniqua and we take it from there.

>>12523922

>>12518821