Previous Artemis missions have relied on repurposed RS-25 engines from NASA’s Space Shuttle Programme. However, beginning with Artemis V, the SLS will use newly manufactured engines designed with modern production techniques to enhance efficiency while maintaining reliability.
The next step for E20001 is acceptance testing, which includes a 500-second static hot-fire test on the Fred Haise Test Stand. The engine will be pushed to full thrust, briefly lowered to 80 percent, and then throttled back up to simulate its in-flight performance.
L3Harris follows a “test like you fly” approach, ensuring the engine’s performance is validated under realistic conditions. This testing method replicates how the RS-25 engines will operate during actual Artemis missions, particularly during key moments such as booster separation.
The new RS-25 engines feature 3D-printed parts and redesigned structural components to streamline manufacturing. By reducing the number of parts and welds required, L3Harris has significantly lowered production costs and improved efficiency.
The company is currently assembling the remaining three engines for Artemis V and refining production techniques to further enhance performance. As NASA’s Artemis programme advances, these next-generation RS-25 engines will play a crucial role in supporting future deep-space exploration missions.
