YF-75
Type: Upper Stage Engine
Country of Origin: China
Manufacturer: CALT
First Flight: February 8, 1994
Status: Active
Propellant (O/F): Liquid Oxygen/Liquid Hydrogen
Mixture Ratio (O/F by mass): 5.1; 6.0 (YF-75D)
Cycle: Gas Generator; Expander (YF-75D)
Chambers: 1
Thrust (vac.): 78.45 kN; 88.26 kN (YF-75D)
Thrust (s.l.):
Throttle:
ISP (vac.): 438 s; 442 s (YF-75D)
ISP (s.l.):
Chamber Pressure: 545 psi; 590 psi (YF-75D)
Nozzle Ratio: 80:1
Burn time: 470 sec; 780 sec (YF-75D)
Ignitions:
Mass: 550 kg
Length: 2.8 m
Diameter: 1.5 m
Used in: Long March 3; Long March 5 (YF-75D)
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