YF-73
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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.
Specifications [edit]
- Vacuum thrust: 44.15 kN
- Vacuum specific impulse: 420 s
- Burn time: 800 s
- Engine weight: 236 kg
- Exit to Throat Area ratio: 40 to 1
- Propellants: LOX & LH2
- Mixture ratio: 5.00
- Design: Gas-generator cycle
- Height: 1.44 m
- Diameter: 2.2 m
- Chambers: 4
- Chamber Pressure: 25.90 bar
- Thrust to Weight Ratio: 18.70(total)
- Restartable: Yes (1 time)
- Contractor: CALT
- Vehicle Application: Long March / CZ-3 - 3rd stage
- Flown: 13 times
- Status: Retired
References [edit]
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