Encyclopedia Astronautica

Credit: © Mark Wade
R-7 aft end
Credit: © Mark Wade
Glushko Lox/Kerosene rocket engine. 912 kN. Sputnik 8K71PS-1. Out of Production. Diameter is per chamber. Isp=308s. First flight 1957.

Application: Sputnik 8K71PS-1.

Chambers: 4. Thrust (sl): 713.600 kN (160,424 lbf). Thrust (sl): 72,768 kgf. Engine: 1,250 kg (2,750 lb). Chamber Pressure: 53.00 bar. Area Ratio: 18.9. Thrust to Weight Ratio: 74.4.

AKA: 8D75PS.
Status: Out of Production.
Unfuelled mass: 1,250 kg (2,750 lb).
Height: 2.86 m (9.38 ft).
Diameter: 0.67 m (2.19 ft).
Thrust: 912.00 kN (205,025 lbf).
Specific impulse: 308 s.
Specific impulse sea level: 241 s.
Burn time: 340 s.
Number: 32 .

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Associated Countries
See also
Associated Launch Vehicles
  • Sputnik 8K71PS Russian intercontinental ballistic orbital launch vehicle. Relatively unmodified R-7 ICBM test vehicles used to launch first two Sputniks. More...

Associated Manufacturers and Agencies
  • Glushko Russian manufacturer of rocket engines and rockets. Glushko Design Bureau, Russia. More...

Associated Propellants
  • Lox/Kerosene 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. In January 1953 Rocketdyne commenced the REAP program to develop a number of improvements to the engines being developed for the Navaho and Atlas missiles. Among these was development of a special grade of kerosene suitable for rocket engines. Prior to that any number of rocket propellants derived from petroleum had been used. Goddard had begun with gasoline, and there were experimental engines powered by kerosene, diesel oil, paint thinner, or jet fuel kerosene JP-4 or JP-5. The wide variance in physical properties among fuels of the same class led to the identification of narrow-range petroleum fractions, embodied in 1954 in the standard US kerosene rocket fuel RP-1, covered by Military Specification MIL-R-25576. In Russia, similar specifications were developed for kerosene under the specifications T-1 and RG-1. The Russians also developed a compound of unknown formulation in the 1980's known as 'Sintin', or synthetic kerosene. More...

Associated Stages
  • Sputnik 8K71PS-1 Lox/Kerosene propellant rocket stage. Loaded/empty mass 94,000/7,495 kg. Thrust 912.00 kN. Vacuum specific impulse 308 seconds. More...

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