Encyclopedia Astronautica
Reaction Motors


American manufacturer of rocket engines. Reaction Motors Incorporated, USA.

The American Interplanetary Society, later the American Rocket Society (ARS), was founded in New York City in April 1930 by David Lasser, G. Edward Pendray, Fletcher Pratt, and nine others, for the "promotion of interest in and experimentation toward interplanetary expeditions and travel.". The ARS launched a series of small experimental rockets in the 1930's.

They first attempted to copy the VfR Mirak rocket, based on the demonstration they saw in Berlin in 1931. This ARS-1 was destroyed in ground tests. The ARS-2 used liquid oxygen and gasoline propellants, and was successfully launched on 4 May 1933. However the rocket veered after takeoff, reaching only 75 m altitude.The ARS evolved eventually into Reaction Motors Inc.

AKA: American Interplanetary Society; American Rocket Society.

More... - Chronology...


Associated Countries
Associated Engines
  • LR10 Reaction Motors rocket engine. Viking RTV-N-12. More...
  • LR2 Reaction Motors liquid rocket engine. More...
  • LR30 Reaction Motors Lox/Ammonia rocket engine. 222.6 kN. D-558-3. Capable rocket engine planned for use in D-558-3 and X-15. Cancelled in favour of XLR-99. More...
  • LR32 Reaction Motors liquid rocket engine. XH-15 blade-tip engine . More...
  • LR33 Reaction Motors liquid rocket engine. cancelled project. Engine development halted, component work continued. More...
  • LR35 Reaction Motors liquid rocket engine. Hiroc RTV-A-2. Engine development halted, component work continued. More...
  • LR39 Reaction Motors Lox/Alcohol rocket engine. 0.225 kN. Small experimental engine. Single thrust chamber, water cooled, equipped only with spark plug igntion system and propellant flow valves. Test article only built. More...
  • LR40 Reaction Motors H2O2/Kerosene rocket engine. 35.690 kN. F8U-1 supercruise engine, 1957. Engine exploded during an early ground test, killing two company mechanics. This accident caused Reaction Motors to pull out of the project. More...
  • LR6 Reaction Motors liquid rocket engine. Lark SAM-N-2, CTV-N-9. More...
  • 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. More...
  • XLR11 Reaction Motors, Thiokol Lox/Alcohol rocket engine. Out of Production. Launch thrust 26.67 kN. Rocket engine developed for X-1 in 1940s to break the sound barrier and used twenty years later to power experimental lifting bodies. Four combustion chambers. More...

See also
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