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The RS-25 engine consists of pumps, valves, and other components working in concert to produce thrust. Fuel (liquid hydrogen) and oxidizer (liquid oxygen) from the Space Shuttle's external tank entered the orbiter at the umbilical disconnect valves and from there flowed through the orbiter's main propulsion system (MPS) feed lines; whereas in the Space Launch System (SLS), fuel and oxidizer ...
The main engines would cut off, and the tank would be jettisoned, as the orbiter used its RCS to increase separation. Cutoff and separation would occur effectively inside the upper atmosphere at an altitude of about 230,000 ft (70,000 m), high enough to avoid subjecting the external tank to excessive aerodynamic stress and heating.
Combustion tap-off: 305 [25] ... RS-25 USA: Rocketdyne: Space Shuttle, SLS: ... Engine Origin Designer Vehicle Status Use Propellant Power cycle
Because of the switch to the less efficient RS-68, the Ares V was widened from 28.6 to 33 feet (8.72 to 10.06 m) to accommodate the extra propellants, while the Ares I was reconfigured to incorporate a fifth solid-rocket segment with the J-2X upper stage, as the new engine has less thrust than the original RS-25. Because of the trade-off, NASA ...
The Space Shuttle continued its ascent using only the RS-25 engines. On earlier missions, the Space Shuttle remained in the heads-down orientation to maintain communications with the tracking station in Bermuda, but later missions, beginning with STS-87, rolled to a heads-up orientation at T+6 minutes for communication with the tracking and ...
The control panel of the Shuttle on the STS-51-F mission, showing the selection of the Abort-to-Orbit (ATO) option. STS-51-F's first launch attempt on July 12, 1985, was halted with the countdown at T−3 seconds after main engine ignition, when a malfunction of the number two RS-25 coolant valve caused an automatic launch abort.
RS-25 (LH2/LOX) Space Shuttle main engine. SJ61 ( JP-7 /ingested air) A dual-mode ramjet / scramjet engine flown on the Boeing X-51 hypersonic demonstration vehicle. J-2X (LH2/LOX) Previously developed to be used on the Earth Departure Stage for the Block II of the Space Launch System , though the EDS was later replaced by the Exploration Upper ...
Rocketdyne RS-25 Space Shuttle Main Engine (SSME) (LH2/LOX) The main engine for the Space Shuttle, also used on the Space Launch System; Rocketdyne RS-27A (RP-1/LOX) Used by the Delta II/III and Atlas ICBM; Rocketdyne RS-56 (RP-1/LOX) Used by the Atlas II first stage; Rocketdyne RS-68 (LH2/LOX) Used by the Delta IV first stage