An Aerojet Rocketdyne RS-25 rocket engine was tested on the Fred Haise Test Stand (formerly A-1 Test Stand) at the John C. Stennis Space Center in Mississippi, on 21 March 2023, at 18:13 UTC (13:13 CDT, 14:13 EDT). This was the fourth hot fire test in a planned 12-test series of the newly redesigned RS-25 engines that will be used beginning with Artemis V. The engine operated at up to 111% power level, the same level needed to help power NASA’s Space Launch System (SLS). The test had a duration of 600 seconds, more than the length of time the engines must fire during an actual flight (about eight-and-a-half minutes).
Credit: NASA
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