Encyclopedia Astronautica
YF-22B


SAST N2O4/UDMH rocket engine. 742 kN.

Thrust: 742.00 kN (166,808 lbf).
Burn time: 127 s.

More... - Chronology...


Associated Countries
See also
Associated Manufacturers and Agencies
  • SAST Shanghai Academy of Spaceflight Technology, Shangai, China. 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...

Associated Stages
  • CZ-4B-2 N2O4/UDMH rocket stage. 742.00 kN (166,808 lbf) thrust. Mass 39,600 kg (87,303 lb). More...

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