NASA conducted a hot-fire test of RS-25 engine No. 10001 on October 21 at the Fred Haise Test Stand at Stennis Space Center, near Bay St. Louis, Mississippi. The test lasted about 500 seconds, aligning with typical RS-25 firing duration used for Space Launch System missions. 1,2

RS-25 engine No. 10001 underwent a hot-fire test at NASA's Stennis Space Center near Bay St. Louis, Mississippi. 1,2

The test lasted approximately 500 seconds, mirroring the burn time for RS-25 engines during SLS launches. 1,2

Tests were part of ongoing development for future Artemis missions. 1,2

2026-10-21: RS-25 engine No. 10001 hot-fire test at Stennis Space Center near Bay St. Louis, MS 1

2026-10-21: Test duration approximately 500 seconds 1

2026-10-21: Test report published/summary released 2

The reports

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1NASA Conducts RS-25 Engine Test in Support of Future Artemis Missions

NASA tested RS-25 engine No. 10001 on Oct. 21 on the Fred Haise Test Stand at NASA’s Stennis Space Center near Bay St. Louis, Mississippi. Test teams fired the developmental engine for almost eight-and-a-half minutes (500 seconds), the same amount of time RS-25 engines fire…

NASA news releases
2RS-25 Engine Tests at NASA Stennis

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…

NASA news releases
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