RS-25 Engine Tests at NASA Stennis
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NASA/Danny Nowlin
Teams at NASA’s Stennis Space Center near Bay St. Louis, Mississippi tested RS-25 engine No. 10001 on Oct. 21, 2026. The hot fire test lasted for almost eight-and-a-half minutes (500 seconds), the same amount of time RS-25 engines fire during launch of NASA’s SLS (Space Launch System) rocket, with a 111% power level. For each Artemis mission, four RS-25 engines produce up to 2 million pounds of combined thrust to help launch the SLS rocket.
Prior to use, all RS-25 engines
Teams at NASA’s Stennis Space Center near Bay St. Louis, Mississippi tested RS-25 engine No. 10001 on Oct. 21, 2026. The hot fire test lasted for almost eight-and-a-half minutes (500 seconds), the same amount of time RS-25 engines fire during launch of NASA’s SLS (Space Launch System) rocket, with a 111% power level. For each Artemis mission, four RS-25 engines produce up to 2 million pounds of combined thrust to help launch the SLS rocket.
Prior to use, all RS-25 engines
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