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

2 min read Preparations for Next Moonwalk Simulations Underway (and Underwater) NASA conducts a hot fire of RS-25 engine No. 10001 on the Fred Haise Test Stand at NASA’s Stennis Space Center near Bay St. Louis, Mississippi, on Oct. 21, 2026. NASA/Danny Nowlin NASA conducts a hot fire of RS-25 engine No. 10001 on the Fred Haise Test Stand at NASA’s Stennis Space Center near Bay St. Louis, Mississippi, on Oct. 21, 2026. NASA/Danny Nowlin NASA conducts a hot fire of RS-25 engine No. 10001 on the Fred Haise Test Stand at NASA’s Stennis Space Center near Bay St. Louis, Mississippi, on Oct. 21, 2026. NASA/Danny Nowlin 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 during launch of NASA’s SLS (Space Launch System) rocket. During the test, operators also fired the engine up to the 111% power level, matching the thrust needed for new production engines to launch the SLS rocket and the Orion spacecraft to orbit. The main objectives of the test were to acceptance test