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YF-40
Beijing Wan Yuan N2O4/UDMH rocket engine. Out of production. Used on CZ-4A launch vehicle. First flight 1988.

Status: Out of production. Number: 4 . Thrust: 49.00 kN (11,015 lbf). Specific impulse: 295 s. Specific impulse sea level: 260 s. Burn time: 135 s. Diameter: 1.45 m (4.75 ft).

Thrust (sl): 43.200 kN (9,712 lbf). Thrust (sl): 4,407 kgf. Thrust to Weight Ratio: 0.

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