Encyclopedia Astronautica
R-9A Stage 2

RD-0110 Engine
Soyuz 11A511 Stage 2 engine displayed at Tsiolkovskiy Museum in Kaluga.
Credit: © Mark Wade
Lox/Kerosene propellant rocket stage. Loaded/empty mass 15,900/2,500 kg. Thrust 304.00 kN. Vacuum specific impulse 330 seconds. Empty mass estimated. Developed into Molniya/Soyuz second stage.

AKA: 8K77 Blok B.
Status: Retired 1969.
Gross mass: 15,900 kg (35,000 lb).
Unfuelled mass: 2,500 kg (5,500 lb).
Height: 9.40 m (30.80 ft).
Diameter: 2.68 m (8.79 ft).
Span: 2.68 m (8.79 ft).
Thrust: 304.00 kN (68,341 lbf).
Specific impulse: 330 s.
Burn time: 140 s.
Number: 70 .

More... - Chronology...

Associated Countries
Associated Engines
  • RD-0106 Kosberg Lox/Kerosene rocket engine. 304 kN. R-9 stage 2. Gas generator cycle. Isp=330s. First flight 1961. More...

Associated Launch Vehicles
  • Romashka Russian intercontinental ballistic missile. Pad-launched version. More...
  • 8K77 Russian intercontinental ballistic missile. Version with vacuum-isolated liquid oxygen tanks to provide capability to hold ready for instant launch. Studied but never developed. More...
  • Desna Russian intercontinental ballistic missile. Silo-launched version, silo hardened to 15-30 atmospheres overpressure. 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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