The newly installed RS-25 engine is the first of 24 new flight engines being built for missions, beginning with Artemis V. NASA will soon conduct a full-duration, 500-second hot fire test on the ...

The RS-25 team at ... After Tuesday’s hot-fire, E0525 will be turned around for the second Retrofit 1b test in early September. ECU FM14 will be installed on the engine for that test, which ...

Hot-fire tests of new RS-25 engine components will resume in 2021 to certify a new manufacturing process during production. Over one hour of engine run-time is planned for the Retrofit 2 series to ...

Read Explore the March 2025 issue, highlighting the installation of the new production RS-25 engine at NASA Stennis, and ...