EXPLORATION UPPER STAGE ENGINES MSFC WILL PROCURE TEN (10) RL10 FLIGHT ENGINES FROM AEROJET ROCKETDYNE, INC. TO SUPPORT THE SPACE LAUNCH SYSTEM (SLS) EXPLORATION MISSIONS 2 AND 3 (EM-2 AND EM-3). EACH FLIGHT WILL REQUIRE A FOUR (4) ENGINE CLUSTER. ADDITIONALLY, TWO (2) SPARE ENGINES WILL BE PROCURED. CORRESPONDING TO THESE SPECIFIC RL10 ENGINES, NASA MSFC WILL PROCURE VEHICLE AND PROGRAM INTEGRAT

National Aeronautics and Space Administration