YF-50t
| Country of origin | People's Republic of China |
|---|---|
| Date | 2003 |
| Designer | CAALPT |
| Application | Upper stage booster |
| Status | Under Development |
| Liquid-fuel engine | |
| Propellant | LOX / LH2 |
| Cycle | Staged combustion |
| Configuration | |
| Chamber | 1 |
| Performance | |
| Thrust (vac.) | 700 kN (157,360 lbf) |
| Thrust (SL) | 540 kN (121,390 lbf) |
| Isp (vac.) | 432 seconds (4.24 km/s) |
| Isp (SL) | 333 seconds (3.27 km/s) |
The YF-50t is a Chinese cryogenic rocket engine being developed to power the upper stages of the Long March 5 family of launch vehicles. It is an indigenous development based on Chinese experience with the YF-73 and YF-75 upper stage engines. It is gimballed in two axes. Hydrogen bled from the engine is used to pressurize the oxygen tank, and helium is used to pressurize the hydrogen tank.[1]
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