RS-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 System) rocket, with a 111% power level. For each […]
NASA conducted a hot fire test of RS-25 engine No. 10001 at Stennis Space Center near Bay St. Louis, Mississippi on October 21, 2026. The test, which lasted for approximately eight-and-a-half minutes, was conducted at 111% power level, mirroring the duration and power output of an RS-25 engine during the launch of NASA's Space Launch System (SLS) rocket.
Each Artemis mission utilizes four RS-25 engines, which generate up to 2 million pounds of combined thrust to assist in launching the SLS rocket. Although this developmental engine will not be used in actual flight, the hot fire test provides NASA and its prime engine contractor, L3Harris Technologies, with valuable data to enhance engine performance and reliability.
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- RS-25 Engine Tests at NASA Stennis nasa.gov
