Engine Model: YF-50t. Designer: CAALPT. Developed in: 1999-2006. Propellants: Lox/LH2. Thrust(vac): 700.000 kN (157,360 lbf). Thrust(sl): 540.000 kN (121,390 lbf). Isp: 432 sec. Isp (sea level): 333 sec. Chambers: 1. Oxidizer to Fuel Ratio: 5.45. Country: China. Status: In development. New Lox/LH2 engine for next generation Chinese launch vehicles. It is an indigenous development based on Chinese experience with the YF-73 and YF-75 upper stage engines. Gimballed in two axes, hydrogen bled from the engine is used to pressurise the oxygen tank, and helium isused to pressurise the hydrogen tank. Firing tests began in 2003 and were to be completed by early 2006. First launch expected in 2008.
YF-50t used on Rocket Stages
