Encyclopedia Astronautica
RD-108-8D75K



r7back.jpg
R-7 aft end
Credit: © Mark Wade
rd107.jpg
RD-107
Credit: © Mark Wade
Glushko Lox/Kerosene rocket engine. 941 kN. Molniya 8K78-1, R-7A 8K74-1, Voskhod 11A57-1, Vostok 8A92-1, Vostok 8A92M-1. Diameter is per chamber. Isp=315s. First flight 1959.

Application: Molniya 8K78-1, R-7A 8K74-1, Voskhod 11A57-1, Vostok 8A92-1, Vostok 8A92M-1.

Chambers: 4. Thrust (sl): 740.400 kN (166,449 lbf). Thrust (sl): 75,504 kgf. Engine: 1,252 kg (2,760 lb). Chamber Pressure: 51.00 bar. Area Ratio: 18.9. Thrust to Weight Ratio: 76.59.

AKA: 8D75K.
Unfuelled mass: 1,252 kg (2,760 lb).
Height: 2.86 m (9.38 ft).
Diameter: 0.67 m (2.19 ft).
Thrust: 941.00 kN (211,545 lbf).
Specific impulse: 315 s.
Specific impulse sea level: 248 s.
Burn time: 340 s.
Number: 488 .

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Associated Countries
See also
Associated Launch Vehicles
  • R-7A Russian intercontinental ballistic missile. The R-7A was an improved version of the R-7 first ICBM, and the one actually deployed to pads in Baikonur and Plesetsk. The missile saw service from 1960 to 1968. Four pads at Plesetsk, and one reserve pad at Baikonur, were operational at the peak of deployment in 1962. These were the Soviet Union's only strategic missile deterrent during the Cuban Missile Crisis. More...
  • Molniya 8K78 Russian orbital launch vehicle. Four stage derivative of the R-7 ICBM developed on a crash-program basis in 1960 for Soviet lunar and planetary deep space probe missions. The third stage found later use in the Voskhod and Soyuz launchers. By the 1970's mature versions of the launch vehicle were used almost entirely for launch of Molniya communications satellites and Oko missile early warning spacecraft into elliptical, 12-hour earth orbits. More...
  • Vostok 8A92 Russian orbital launch vehicle. The 8A92 was a modernized version of the Vostok booster used for launch of Zenit-2 reconnaisance satellites. More...
  • Sputnik 11A59 Russian orbital launch vehicle. Two stage version of Vostok 11A57. Used for flight test of prototype Chelomei ASAT after cancellation of UR-200 booster and before availability of Tsiklon. More...
  • Voskhod 11A57 Russian orbital launch vehicle. The 11A57 took the large third stage originally developed for the 8K78 interplanetary probe projects and applied it to increasing R-7 low earth orbit performance. It was primarily designed to launch the Zenit-4 reconnaisance satellite, but was also used for the Voskhod manned flights and later for a variety of other Zenit series versions. More...
  • Vostok 8A92M Russian orbital launch vehicle. Second generation space systems required injection of lighter but higher-altitude Meteor and other satellite payloads into sun-synchronous orbits. The 8A92M version was developed for this purpose. First use was the Meteor launch on 29 June 1977. 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
  • Molniya 8K78-1 Lox/Kerosene propellant rocket stage. Loaded/empty mass 100,500/6,800 kg. Thrust 941.00 kN. Vacuum specific impulse 315 seconds. More...
  • R-7A 8K74-1 Lox/Kerosene propellant rocket stage. Loaded/empty mass 101,700/7,300 kg. Thrust 940.40 kN. Vacuum specific impulse 315 seconds. More...
  • Voskhod 11A57-1 Lox/Kerosene propellant rocket stage. Loaded/empty mass 100,500/6,800 kg. Thrust 941.00 kN. Vacuum specific impulse 315 seconds. More...
  • Vostok 8A92-1 Lox/Kerosene propellant rocket stage. Loaded/empty mass 100,400/6,800 kg. Thrust 940.40 kN. Vacuum specific impulse 315 seconds. More...
  • Vostok 8A92M-1 Lox/Kerosene propellant rocket stage. Loaded/empty mass 101,000/6,500 kg. Thrust 940.40 kN. Vacuum specific impulse 315 seconds. More...

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