Encyclopedia Astronautica
RD-864


Yuzhnoye N2O4/UDMH rocket engine. 20.2 kN. R-36M vehicle bus. Out of Production. Isp=309s. Two thrust levels. The four thruster swing out of the stage housing before use. Chamber pressure 41 / 17 bar. Specific impulse 309 / 298 sec.

Diameter 3.0 / 4.02 m.

Application: R-36M UTTKh / RS-20B (SS-18 Mod 2) vehicle bus.

Characteristics

Chambers: 4. Throttled thrust(vac): 8.450 kN (1,900 lbf). Engine: 199 kg (438 lb). Chamber Pressure: 41.00 bar. Thrust to Weight Ratio: 10.35. Oxidizer to Fuel Ratio: 1.8.

Status: Out of Production.
Unfuelled mass: 199 kg (438 lb).
Height: 1.42 m (4.65 ft).
Diameter: 3.00 m (9.80 ft).
Thrust: 20.20 kN (4,541 lbf).
Specific impulse: 309 s.
Burn time: 600 s.
First Launch: 1976-78.

More... - Chronology...


Associated Countries
See also
Associated Manufacturers and Agencies
  • Yuzhnoye Ukrainian manufacturer of rockets, spacecraft, and rocket engines. Yangel Design Bureau, Dnepropetrovsk, Ukraine. More...

Associated Propellants
  • N2O4/UDMH Nitrogen tetroxide became the storable liquid propellant of choice from the late 1950's. Unsymmetrical Dimethylhydrazine ((CH3)2NNH2) became the storable liquid fuel of choice by the mid-1950's. Development of UDMH in the Soviet Union began in 1949. It is used in virtually all storable liquid rocket engines except for some orbital manoeuvring engines in the United States, where MMH has been preferred due to a slightly higher density and performance. More...

Bibliography
  • Shnyakin, V N, Shidkostnye Raketye Dvigateli - Opisanie i Osnovnye Tekhnicheskie Dannye, GKB Yuzhnoe "Yangel", Dnepropetrovsk 1996 via Dietrich Haeseler.

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