NASA and L3Harris Technologies have completed a successful hot-fire test of a newly produced RS-25 engine, a key component of the Space Launch System (SLS) rocket that will power the Artemis V mission.

The engine fired for 500 seconds at Stennis Space Center and reached 111% of its rated power level, marking the second flight-ready RS-25 built using modern manufacturing techniques.

L3Harris shared pictures of the engine on its Facebook page before the test.

The RS-25 has a long history within NASA’s human spaceflight program. Four engines power each SLS core stage, and while the first four Artemis missions use upgraded shuttle-era RS-25s, Artemis V will introduce newly manufactured engines that incorporate advanced materials and 3D-printed components.

The test ties directly into work u

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