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Engine Model: YF-25. Designer: Beijing Wan Yuan. Propellants: N2O4/UDMH. Thrust(vac): 787.400 kN (177,015 lbf). Thrust(sl): 689.300 kN (154,961 lbf). Isp: 297 sec. Isp (sea level): 260 sec. Diameter: 1.00 m (3.20 ft). Chambers: 1. Thrust to Weight Ratio: 0.00. Country: China. Status: In Production.

Engine Model: YF-25/23. Designer: Beijing Wan Yuan. Propellants: N2O4/UDMH. Thrust(vac): 831.000 kN (186,816 lbf). Thrust(sl): 732.400 kN (164,650 lbf). Isp: 295 sec. Isp (sea level): 260 sec. Burn time: 295 sec. Diameter: 3.35 m (10.99 ft). Chambers: 1. Chamber Pressure: 71.00 bar. Area Ratio: 10.00. Country: China. Status: In production. First Flight: 1988. Last Flight: 2006. Flown: 32.

Cluster of YF-25 and 4 x YF-23 verniers.

YF-25 used on Rocket Stages
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