Encyclopedia Astronautica

Kosberg N2O4/UDMH rocket engine. 30.980 kN. Proton stage 3 vernier. In Production. Based on RD-0207. Four used as steering engines for Proton Stage 3 in system RD-0212. Isp=293s. First flight 1967.

Application: Proton stage 3 vernier.

Chambers: 4. Chamber Pressure: 53.00 bar.

AKA: 8D811.
Status: In Production.
Thrust: 30.98 kN (6,965 lbf).
Specific impulse: 293 s.
First Launch: 1962-68.

More... - Chronology...

Associated Countries
See also
Associated Manufacturers and Agencies
  • Kosberg Russian manufacturer of rocket engines. Kosberg Design Bureau, Russia. 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...

  • Haeseler, Dietrich, Visit to the museum of Chemical Automatics Design Bureau, Voronezh 1992 via Dietrich Haeseler.

Associated Stages
  • Proton K-3 N2O4/UDMH propellant rocket stage. Loaded/empty mass 50,747/4,185 kg. Thrust 630.17 kN. Vacuum specific impulse 325 seconds. More...

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