YF-23 (rocket engine)
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| Country of origin | China |
|---|---|
| First flight | 1974-11-05 |
| Designer | Academy of Aerospace Liquid Propulsion Technology |
| Application | Vernier engine |
| Associated L/V | Feng Bao 1, Long March 2, Long March 3 and Long March 4 |
| Status | In Production |
| Liquid-fuel engine | |
| Propellant | N2O4 / UDMH |
| Mixture ratio | 1.57 |
| Configuration | |
| Chamber | 4 |
| Performance | |
| Thrust (vac.) | 47.1 kN (10,600 lbf) |
| Isp (vac.) | 297 seconds (2.91 km/s) |
| Burn time | 300s |
| Used in | |
| Long March 2F, Long March 3A, Long March 3B, Long March 3C, Long March 4B and Long March 4C second stage. | |
| References | |
| References | [1][2][3][4] |
The YF-23 is a liquid rocket vernier engine, burning N2O4 and UDMH.[5] It is used in along the YF-22 to form the YF-24 and YF-25 propulsion modules.[3][6][7][8]
Versions
The basic engine has been used since the Feng Bao 1 rocket and has been the vernier propulsion of the Long March 2, Long March 3 and Long March 4 families second stage.[1][9][10]
- YF-23: Original version.
- YF-23B (AKA DaFY21-1): Improved version.[9][11][12]
- YF-23F: Improved version.[9]
Modules
This engine is bundled into modules along the YF-22 upper stage engine.[13][14][15][16]
The relevant modules for second stage application are:
- YF-24: A module comprising an YF-22 and a single YF-23 verniers.
- YF-24B: A module comprising an YF-22B and a single YF-23B verniers.
- YF-24E: A module comprising an YF-22E and a single YF-23F verniers.[17]
References
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