YF-20 and YF-22
Type: Lower Stage Engine and Upper Stage Variant
Country of Origin: China
Manufacturer:
First Flight: June 1, 1995
Status: Active
Propellant (O/F): Nitrogen Tetroxide/Unsymmetrical Dimethylhydrazine
Mixture Ratio (O/F by mass):
Cycle: Gas Generator
Chambers: 1
Thrust (vac.): 816.3 kN
Thrust (s.l.): 731.5 kN
Throttle:
ISP (vac.): 289 s
ISP (s.l.): 259 s
Chamber Pressure: 1030 psi
Nozzle Ratio: 12.69:1
Burn time: 160 s
Ignitions: 1
Mass: 2850 kg
Length:
Diameter: 0.84 m
Used in: Long March 1, Long March 2, Long March 3, Long March 4
Links: