Science
Stuck propulsion valve delays second SLS test-firing – Spaceflight Now – Spaceflight Now
One of the SLS core stage’s four RS-25 engines during a wet dress rehearsal in December. Credit: NASA
A troublesome liquid oxygen valve on the Space Launch System’s first flight-rated core stage will keep NASA from performing a second test-firing of the rocket’s four main engines this week.
NASA hoped to conduct the second hotfire test on SLS core stage Thursday, but the agency announced Monday that the engine firing will be postponed to evaluate a misbehaving valve in the rocket’s propulsion system.
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