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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 ...
Engine Origin Designer Vehicle Status Use Propellant Power cycle Specific impulse (s) [a] Thrust (N) [a] Chamber pressure (bar) Mass (kg) Thrust: weight ratio [b] Oxidiser: fuel ratio
The RS-26 Rubezh (Russian: РС-26 Рубеж, meaning frontier or boundary), designated by NATO as SS-X-31, [4] is a Russian solid-fueled intermediate-range ballistic missile (IRBM) with a nuclear warhead, of which the range bracket just barely classifies it as an intercontinental ballistic missile (ICBM).
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
Later flights will switch to an RS-25 variant optimized for expended use, the RS-25E, which will lower per-engine costs by over 30%. [32] [33] The thrust of each RS-25D engine has been increased from 492,000 lbf (2,188 kN), as on the Space Shuttle, to 513,000 lbf (2,281 kN) on the sixteen modernized engines. The RS-25E will further increase per ...
The first test of the RS-25 engine for use on the Space Launch System (SLS) rocket was conducted January 9, 2015. Stennis completed testing of all 16 heritage RS-25 engines that will help launch the first four SLS missions as part of NASA's Artemis program on April 4, 2019. [20]
An example of a specific impulse measured in time is 453 seconds, which is equivalent to an effective exhaust velocity of 4.440 km/s (14,570 ft/s), for the RS-25 engines when operating in a vacuum. [36]
The RS-25 Space Shuttle main engine is another example of a staged combustion engine, and the first to use liquid oxygen and liquid hydrogen. [4] Its counterpart in the Soviet shuttle was the RD-0120 , which had similar specific impulse , thrust, and chamber pressure, but with some differences that reduced complexity and cost at the expense of ...