The Rocketdyne XRS-2200 was an experimental linear

aerospike engine The aerospike engine is a type of rocket engine that maintains its aerodynamic efficiency across a wide range of altitudes. It belongs to the class of altitude compensating nozzle engines. Aerospike engines were proposed for many single-stage- ...

developed in the mid-1990s for the Lockheed Martin X-33 program. The XRS-2200 engine's powerpack (Turbomachinery and Gas Generator) was derived from the

Rocketdyne J-2 The J-2, commonly known as Rocketdyne J-2, was a liquid-fuel rocket, liquid-fuel cryogenic rocket engine used on NASA's Saturn IB and Saturn V launch vehicles. Built in the United States by Rocketdyne, the J-2 burned Cryogenic fuel, cryogenic liqu ...

engine, the upper stage engine of the

Saturn V The Saturn V is a retired American super heavy-lift launch vehicle developed by NASA under the Apollo program for human exploration of the Moon. The rocket was human-rated, had multistage rocket, three stages, and was powered by liquid-propel ...

moon rocket developed under the

Apollo Program The Apollo program, also known as Project Apollo, was the United States human spaceflight program led by NASA, which Moon landing, landed the first humans on the Moon in 1969. Apollo followed Project Mercury that put the first Americans in sp ...

in the 1960's. The XRS-2200 used the J-2's combustion cycle and propellant choice. Rocketdyne intended to develop the subscale XRS-2200 into the RS-2200 for use on the VentureStar. While the X-33 program was cancelled, two XRS-2200 engines were produced and tested.

References

{{Reflist XRS-2200 Rocketdyne Rocket engines