YF-77

The YF-77 is currently China's most powerful cryogenic rocket engine using liquid hydrogen (LH2) fuel and liquid oxygen (LOX) oxidizer. Engine development began in the 2000s, with testing directed by the China National Space Administration (CNSA) commencing in 2005. The engine has been successfully tested by mid-2007.

Specifications

*Vacuum thrust: 673 kN
*Vacuum specific impulse: 438 s
*Sea Level thrust: 550 kN
*Sea Level specific impulse: 333 s
*Burn time: 500 s (estimated)
*Engine weight: TBA
*Exit to Throat Area ratio: TBA
*Propellants: LOX & LH2
*Mixture ratio: 5.45
*Design: TBA
*Diameter: TBA
*Chambers: TBA
*Chamber Pressure: TBA
*Thrust to Weight Ratio: TBA
*Restartable: TBA
*Contractor: China Academy of Aerospace Liquid Propulsion Technology
*Vehicle Application: Long March / CZ-5
*Status: in Development

References

* [http://www.geocities.com/launchreport/cz5.html Space Launch Report]