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YF-25/23
Part of YF-20 Family
Beijing Wan Yuan N2O4/UDMH rocket engine. In production. Cluster of YF-25 and 4 x YF-23 verniers. First stage engine for CZ-2D, CZ-2E, CZ-2E(A), CZ-3A, CZ-3B, CZ-3C, CZ-4A. First flight 1988.

Status: In production. Number: 32 . Thrust: 831.00 kN (186,816 lbf). Specific impulse: 295 s. Specific impulse sea level: 260 s. Burn time: 295 s. Diameter: 3.35 m (10.99 ft).

Thrust (sl): 732.400 kN (164,650 lbf). Thrust (sl): 74,685 kgf. Chamber Pressure: 71.00 bar. Area Ratio: 10.



Family: Storable liquid. Country: China. Launch Vehicles: Chang Zheng 4, Chang Zheng 2E, Chang Zheng 2D, Chang Zheng 3A, Chang Zheng 3B, Chang Zheng 2E(A), Chang Zheng 3C. Propellants: N2O4/UDMH. Stages: CZ-2E-2, CZ-3A-2, CZ-4A-2. Agency: Beijing Wan Yuan.

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