This page no longer updated from 31 October 2001. Latest version can be found at www.astronautix.com
Designer: Beijing Wan Yuan Industry Corp. Used on stages: FB-1-2. Used on launch vehicles: CZ-2A, FB-1. Propellants: N2O4/UDMH Thrust(vac): 77,700 kgf. Thrust(vac): 762.00 kN. Isp: 295 sec. Isp (sea level): 270 sec. Burn time: 127 sec. Diameter: 3.4 m. Chambers: 1. Chamber Pressure: 71.00 bar. Area Ratio: 10.00. Country: China. Status: Out of Production. First Flight: 1972. Last Flight: 1981. Flown: 12. Comments: Cluster of YF-22 and 4 x YF-23 verniers.
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Last update 12 March 2001.
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© Mark Wade, 2001 .