Encyclopedia Astronautica
Soyuz 11A511-1


Lox/Kerosene propellant rocket stage. Loaded/empty mass 100,500/6,500 kg. Thrust 977.70 kN. Vacuum specific impulse 315 seconds.

Cost $ : 13.000 million.

AKA: 11S59 Block D.
Status: Retired 1975.
Gross mass: 100,500 kg (221,500 lb).
Unfuelled mass: 6,500 kg (14,300 lb).
Height: 27.80 m (91.20 ft).
Diameter: 2.95 m (9.67 ft).
Span: 2.95 m (9.67 ft).
Thrust: 977.70 kN (219,796 lbf).
Specific impulse: 315 s.
Specific impulse sea level: 252 s.
Burn time: 292 s.
Number: 36 .

More... - Chronology...


Associated Countries
Associated Engines
  • RD-108-11D512 Glushko Lox/Kerosene rocket engine. 997 kN. Soyuz 11A511-1, Soyuz 11A511U-1. Design 2000. Diameter is per chamber. Isp=315s. First flight 1965. More...

Associated Launch Vehicles
  • Vostok 11A510 Russian orbital launch vehicle. Version of R-7 launch vehicle with Vostok second stage and unknown third stage used only twice to launch prototype RORSATs. These satellites were originally to have been launched on the cancelled UR-200 launcher, and operational satellites used Tsyklon-2 launchers. More...
  • Soyuz 11A511 Russian orbital launch vehicle. Standardized launch vehicle designed to replace a proliferation of earlier models (8K72, 8A91, 8K74, 8K78, 11A57). Designed initially to support launch of the Soyuz complex (7K manned, 9K rocket stage, and 11k tanker) and Zenit-4 reconnaisance satellite. Later 'U' model extended to cover a range of follow-on satellites. Compared to 11A57, the telemetry system was reduced in mass to no more than 150 kg, and engines were cherry-picked for the vehicle core to ensure that specific impulse was no less than 252 seconds at sea level, 315 in vacuum. 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...

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