Encyclopedia Astronautica
LR8-RM-5


Reaction Motors Lox/Alcohol rocket engine for rocketplanes. Out of Production. Launch thrust 26.67 kN. Advanced version of the LR-11, 4 chambers. Engine in the X-1E was modified in 1958 to increase chamber pressure to 20 atm and burn Hydyne fuel.

Application: Manned rocketplanes.

Chambers: 4. Thrust (sl): 26.670 kN (5,996 lbf). Thrust (sl): 2,720 kgf. Engine: 157 kg (346 lb). Chamber Pressure: 17.00 bar.

Status: Out of Production.
Height: 1.45 m (4.75 ft).
Diameter: 0.46 m (1.50 ft).
Thrust: 26.67 kN (5,996 lbf).

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Associated Countries
Associated Spacecraft
  • D-558-2 American manned rocketplane. Flown from 1949. Research airplane Douglas D-558. Airplane had both jet and rocket engines and was flown from ground takeoff. The D-558-II Skyrocket exceeded the speed of sound at Edwards AFB, Calif. More...
  • X-1E American manned rocketplane. Study 1954. The X-1E was designed to test an ultra-thin 4% thickness to cord wing for supersonic flight. More...

See also
Associated Manufacturers and Agencies
Associated Propellants
  • Lox/Alcohol Liquid oxygen was the earliest, cheapest, safest, and eventually the preferred oxidiser for large space launchers. Its main drawback is that it is moderately cryogenic, and therefore not suitable for military uses where storage of the fuelled missile and quick launch are required. Alcohol (C2H5OH) was the fuel used for the German V-2 rocket, and the first derivative rocket engines in the United States, Soviet Union, and China used it as well. Better performance was achieved by increasing the alcohol concentration in the post-war engines. But after better-performance rocket-grade kerosene was developed by Rocketdyne in the REAP program of 1953, use of alcohol was abandoned. More...

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