YF-73

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YF-73
Country of origin China
Manufacturer China Academy of Launch Vehicle Technology (CALT)
Status Retired
Liquid-fuel engine
Propellant Liquid oxygen / Liquid hydrogen
Mixture ratio 5.00
Cycle Gas-generator
Configuration
Chamber 4
Nozzle ratio 40:1
Performance
Thrust (vac.) 44.15 kilonewtons (9,930 lbf)
Thrust (SL) 11.00 kilonewtons (2,470 lbf)
Thrust-to-weight ratio 18.7
Chamber pressure 25.9 bars (2,590 kPa)
Isp (vac.) 420 seconds (4.1 km/s)
Isp (SL) 425 seconds (4.17 km/s)
Burn time 800 seconds (13 min)
Dimensions
Length 1.44 metres (4 ft 9 in)
Diameter 2.2 metres (7 ft 3 in)
Dry weight 236 kilograms (520 lb)
Used in
Long March 3 3rd stage
References
References [1]


The YF-73 is China's first successful, cryogenic, gimballed engine, using liquid hydrogen (LH2) fuel and liquid oxygen (LOX) oxidizer. It was developed in the early 1980s and first flight was in 1984.

Footnotes[edit]

  1. ^ "YF-23". Encyclopedia Astronautica. Retrieved 6 November 2013. 

References[edit]