YF-79
Country of origin | ![]() |
---|---|
Designer | Beijing Aerospace Propulsion Institute |
Associated LV | Long March 9 |
Predecessor | YF-75D |
Status | In development |
Liquid-fuel engine | |
Propellant | Liquid oxygen / Liquid hydrogen |
Mixture ratio | 5.5 |
Cycle | Closed Expander Cycle |
Configuration | |
Chamber | 1 |
Nozzle ratio | 260 |
Performance | |
Thrust, vacuum | 243.3 kilonewtons (54,700 lbf) |
Chamber pressure | 8.0 MPa (1,160 psi) |
Specific impulse, vacuum | 460.1 seconds (4.512 km/s) |
Used in | |
Long March 9 | |
References | |
References | [1][2][3] |
The YF-79 is a liquid cryogenic rocket engine burning liquid hydrogen and liquid oxygen in a closed expander cycle. It is China's fourth generation of upper stage cryogenic propellant engine, after the YF-73, YF-75 and the YF-75D. It can do multiple restarts thanks to an electric spark igniter and a prototype was tested at 60% and 100% (25 tonnes-force (250 kN; 25 LTf; 28 STf)) thrust levels in December 2021.[1]
It will be used on the third stage of the Long March 9.
References[]
- ^ a b Xin, Zhang. "我国重型运载火箭25吨级膨胀循环氢氧发动机首台推力室挤压试验取得圆满成功" [First thrust chamber test firing of China's heavy launch vehicle 25-tonne hydrogen-oxygen expansion cycle engine a complete success] (in Chinese). Archived from the original on 2021-12-22. Retrieved 2021-12-22.
- ^ Brügge, Norbert (2021-12-22). "An overlook to China's new generation of Rocket Engines". B14643.de. Archived from the original on 2021-12-22. Retrieved 2021-12-22.
- ^ 崔荣军,何伟锋. "25吨级膨胀循环发动机技术方案研究". 导弹与航天运载技术2015年06期. Retrieved 2021-12-23.
External links[]
Categories:
- Rocket engines using hydrogen propellant
- Rocket engines of China
- Rocket engines using the expander cycle
- Rocketry stubs