YF-75

= YF-75 (Rocket Engine) =

The YF-75 is China's second generation of cryogenic gimballed engine, using liquid hydrogen (LH2) fuel and liquid oxygen (LOX) oxidizer. Its development began in the early 1990s and its first flight was in 1994.

Specifications

*Vacuum thrust: 78.45 kN
*Vacuum specific impulse: 437 s
*Burn time: 470 s
*Engine weight: 550 kg
*Exit to Throat Area ratio: 80 to 1
*Propellants: LOX & LH2
*Mixture ratio: 5.00
*Design: Gas-generator cycle
*Height: 2.8 m
*Diameter: 1.50 m
*Chambers: 1
*Chamber Pressure: 37.60 bar
*Thrust to Weight Ratio: 14.26
*Restartable: Yes (1 time)
*Contractor: CALT
*Vehicle Application: Long March / CZ-3A, CZ-3B, CZ-3C - 3rd stage
*Status: in Service & Development

References

* [http://www.astronautix.com/engines/yf75.htm Encyclopedia Astronautica]
* [http://www.geocities.com/CapeCanaveral/Launchpad/1921/engine.htm Go Taikonauts - An unofficial Chinese Space Website]
* [http://www.calt.com/zycp/yzhj/200703181313154a301a.asp Long March 3B Profile]