Engine RD-108A
RD-108A liquid rocket engine for the second stage of the Soyuz launch vehicle.
Technical characteristics
| Engine thrust near the Earth | 80.8 ts |
| Specific impulse in vacuum | 320.6 s |
| Pressure in the combustion chamber | 55.5 kgf/cm2 |
| Engine weight | 1075 kg |
| Probability of failure-free operation of the engine | 99.88% |
Advantages
- High reliability - 0.996.
- 4 steering units providing thrust vector control in pitch, yaw and roll.
- Adjustment of traction and component ratio over a wide range.
- Increased operating time up to 200 seconds
- Certified and used for launches of manned spacecraft.
Application
Launcher rockets:
- Soyuz-2.1a
- Soyuz-2.1b
- Soyuz-ST-A
- Soyuz-ST-B
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