YF-20A Chinese Engine Credit - Sven Grahn Media Gallery Designer: Beijing Wan Yuan Industry Corp. 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. YF-20A used on Rocket Stages Used on stage: CZ-2C-1. on launch vehicle: CZ-2C. Used on stage: CZ-2C-1. on launch vehicle: CZ-2C/SD. Used on stage: CZ-3-1. on launch vehicle: CZ-3. Used on stage: FB-1-1. on launch vehicle: CZ-2A. Used on stage: FB-1-1. on launch vehicle: FB-1.                   Contact us with any corrections, additions, or comments. Conditions for use of drawings, pictures, or other materials from this site.. To contact astronauts or cosmonauts. © Mark Wade, 1997 - 2007 except where otherwise noted.

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