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Chinese Engine
Credit - Sven Grahn
Engine Model: YF-20A. Designer: Beijing Wan Yuan. Propellants: N2O4/UDMH. Thrust(vac): 750.200 kN (168,652 lbf). Thrust(sl): 672.300 kN (151,139 lbf). Isp: 289 sec. Isp (sea level): 259 sec. Burn time: 132 sec. Diameter: 0.84 m (2.75 ft). Chambers: 1. Chamber Pressure: 71.00 bar. Area Ratio: 10.00. Thrust to Weight Ratio: 0.00. Country: China. Status: Out of production. First Flight: 1972. Last Flight: 2006. Flown: 212.

Engine Model: YF-20B. Designer: Beijing Wan Yuan. Propellants: N2O4/UDMH. Thrust(vac): 816.300 kN (183,512 lbf). Thrust(sl): 731.500 kN (164,448 lbf). Isp: 289 sec. Isp (sea level): 259 sec. Burn time: 170 sec. Diameter: 0.84 m (2.75 ft). Chambers: 1. Chamber Pressure: 71.00 bar. Area Ratio: 10.00. Thrust to Weight Ratio: 0.00. Country: China. Status: In production. First Flight: 1988. Last Flight: 2006. Flown: 236.

YF-20 used on Rocket Stages
  • Used on stage: CZ-1. on launch vehicle: CZ.
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