Engine RD-107A

Liquid-propellant rocket engine RD-107A for the first stage of the Soyuz launch vehicle.
Technical characteristics
| Engine thrust near the Earth | 85.6 ts | 
| Specific impulse in vacuum | 320.2 s | 
| Pressure in the combustion chamber | 61.2 kgf/cm2 | 
| Engine weight | 1,090 kg | 
| Probability of failure-free operation of the engine | 99.94% | 
Application
Launcher rockets of the Soyuz family.

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