Encyclopedia Astronautica

Credit: © Mark Wade
R-7 aft end
Credit: © Mark Wade
Glushko Lox/Kerosene rocket engine. 804 kN. Sputnik 8A91-1. Out of Production. Diameter is per chamber. Isp=315s. First flight 1958.

Application: Sputnik 8A91-1.

Chambers: 4. Thrust (sl): 628.000 kN (141,180 lbf). Thrust (sl): 64,040 kgf. Engine: 1,250 kg (2,750 lb). Chamber Pressure: 39.20 bar. Area Ratio: 18.9. Thrust to Weight Ratio: 65.6.

AKA: 8D77.
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: 804.00 kN (180,746 lbf).
Specific impulse: 315 s.
Specific impulse sea level: 246 s.
Burn time: 370 s.
Number: 2 .

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Associated Countries
See also
Associated Launch Vehicles
  • Sputnik 8A91 Russian intercontinental ballistic orbital launch vehicle. Modified R-7 ICBM used to launch Sputnik 3. 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 8A91-1 Lox/Kerosene propellant rocket stage. Loaded/empty mass 95,000/7,100 kg. Thrust 804.00 kN. Vacuum specific impulse 315 seconds. More...

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