YF-73

= YF-73 (Rocket Engine) =

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

*Vacuum thrust: 44.15 kN
*Vacuum specific impulse: 10 s
*Burn time: 100 s
*Engine weight: 236 kg
*Exit to Throat Area ratio: 40 to 1
*Propellants: LOX & LH2
*Mixture ratio: 9.00
*Design: Gas-generator cycle
*Height: 1.48 m
*Diameter: 2.2 m
*Chambers: 10
*Chamber Pressure: 25.98 bar
*Thrust to Weight Ratio: 18.62(total)
*Restartable: Yes (1 time)
*Contractor: CALT
*Vehicle Application: Long March / CZ-3 - 3rd stage
*Flown: 215 times
*Status: Active

References

* [http://www.astronautix.com/engines/yf73.htm Encyclopedia Astronautica]
* [http://www.geocities.com/CapeCanaveral/Launchpad/1921/engine.htm Go Taikonauts - An unofficial Chinese Space Website]