Encyclopedia Astronautica

Beijing Wan Yuan N2O4/UDMH rocket engine. 11 kN. In Production. Used as vernier motor with YF-22 and YF-25. Isp=282s.

Thrust (sl): 10.200 kN (2,293 lbf). Thrust (sl): 1,036 kgf. Thrust to Weight Ratio: 0.

Status: In Production.
Diameter: 0.10 m (0.32 ft).
Thrust: 11.00 kN (2,472 lbf).
Specific impulse: 282 s.
Specific impulse sea level: 260 s.

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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...

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