YF-73
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| Country of origin | China |
|---|---|
| Manufacturer | China Academy of Launch Vehicle Technology (CALT) |
| Status | Retired |
| Liquid-fuel engine | |
| Propellant | Liquid oxygen / Liquid hydrogen |
| Mixture ratio | 5.00 |
| Cycle | Gas-generator |
| Configuration | |
| Chamber | 4 |
| Nozzle ratio | 40:1 |
| Performance | |
| Thrust (vac.) | 44.15 kilonewtons (9,930 lbf) |
| Thrust (SL) | 11.00 kilonewtons (2,470 lbf) |
| Thrust-to-weight ratio | 18.7 |
| Chamber pressure | 25.9 bars (2,590 kPa) |
| Isp (vac.) | 420 seconds (4.1 km/s) |
| Isp (SL) | 425 seconds (4.17 km/s) |
| Burn time | 800 seconds (13 min) |
| Dimensions | |
| Length | 1.44 metres (4 ft 9 in) |
| Diameter | 2.2 metres (7 ft 3 in) |
| Dry weight | 236 kilograms (520 lb) |
| Used in | |
| Long March 3 3rd stage | |
| References | |
| References | [1] |
The YF-73 is China's first successful, cryogenic, gimballed engine, using liquid hydrogen (LH2) fuel and liquid oxygen (LOX) oxidizer. It was developed in the early 1980s and first flight was in 1984.
Footnotes
References
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