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 …

Three SSME's plus two Solid Rocket Boosters (SRBs) power the reusable Space Shuttle. Each SSME produces 375,000 lbs of thrust or a total of 1,125,000 lbs and uses liquid oxygen and …

Four RS-25 engines located at the bottom of the core stage power the rocket on its eight and a half minute climb to space with more than 2 million pounds of thrust. The RS-25 evolved from …

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 …

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 …

What are the parts of the SSME, and what do they do? Valves between the external fuel tank and the SSME control the amount of fuel that goes to the low-pressure oxidizer and fuel turbopumps.

Jan 6, 2025 · The three SSME’s, in conjunction with the Solid Rocket Boosters, provided thrust to lift the Orbiter off the ground for the initial ascent. The main engines continued to operate for …

Currently scheduled for April 2026, the mission’s date could be moved up to as early as February if no major issues arise. Meanwhile, the program’s future faces uncertainties as the proposed …