The RS-25, also known as the Space Shuttle Main Engine (SSME), [1] is a liquid-fuel cryogenic rocket engine that was used on NASA 's Space Shuttle and is used on the Space Launch …

The Space Shuttle Main Engine (SSME) was the only large reusable, liquid rocket engine in the world. It operated at greater temperature extremes than any mechanical system in common …

The Space Shuttle propulsion system consists of two large solid rocket booster (SRB) motors, three space shuttle main engines (SSME), and an external propellant tank (ET), all used to …

G LOUIS F. DROUIN, 96 CONWELL AV. , SOMERVILLE MA . A ALLAN W. GORDON, 78 ROCKLAWN AV. G BURNETT V. VICKERS, BOX 181-CHAMPLAI N RD. G JAMES I. RYAN, …

After writing the question Do Blue Origin's BE-3 engines need to run for 7 seconds to “warm up”?, I took a look at the YouTube video SSME ignition sequence (found in What are the small gas …

After NASA's decision to retire the Shuttle fleet in 2010, there was an attempt to keep the SSME in production as the second stage engine of the Ares I launch vehicle and the booster stage …

Aug 22, 2025 · The Space Shuttle Main Engine (SSME) is a liquid-fueled rocket engine that was used on NASA’s Space Shuttle program. It was developed by Rocketdyne and was designed …

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Unlike expendable engines, the SSMEs did not end up at the bottom of the ocean. The SSME had a lifetime rating of 27,000 seconds, equivalent to 55 missions. The operating conditions …

Space Shuttle Main Engine (SSME) Enhancements When a NASA Space Shuttle lifts off the launch pad, it does so with the help of three reusable, high-performance rocket engines.