YF-79
| Country of origin |  People's Republic of China |
|---|---|
| Designer | Beijing Aerospace Propulsion Institute |
| Associated LV | Long March 9 |
| Predecessor | YF-75D |
| Status | In development |
| Liquid-fuel engine | |
| Propellant | Liquid oxygen / Liquid hydrogen |
| Cycle | Closed Expander Cycle |
| Performance | |
| Thrust, vacuum | 25 tonnes-force (250 kN; 25 LTf; 28 STf) |
| Specific impulse, vacuum | 460 seconds (4.5 km/s) |
| Used in | |
| Long March 9 | |
| References | |
| References | [1][2] |
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 on 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.
External links
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