|
RD-120
(altitude engine) |
RD-120K
(booster engine) |
Propellant Combination
Oxidizer
Fuel |
Liquid Oxygen (LOX)
Rocket Propellant (RP) |
Liquid Oxygen (LOX)
Rocket Propellant (RP) |
| Engine Cycle: |
Staged Combustion |
Staged Combustion |
| Average Thrust: |
187,000 lb vac
830,280 kN |
176,400 lb SL /
191,200 lb vac
783,220 kN / 848,930 kN |
| Chamber Pressure: (Pc) |
2,360 psia |
2,360 psia |
| Mixture Ratio: |
2.6 : 1 |
2.6 : 1 |
| Isp: |
350 sec vac |
304 sec SL
330 sec vac |
| Nozzle Area Ratio: |
106 : 1 |
24.6 : 1 |
| Gimbal Capability: |
none
(requires modification) |
none
(requires modification) |
| Engine Mass: |
2,479 lb (dry)
1,124 kg (dry) |
2,381 lb (dry)
1,080 kg (dry) |
| Engine Thrust to Weight |
75 |
80 |
| Mixture Ratio Control: |
Yes (EMA) |
Yes (EMA) |
| Throttle Range: (% Pc) |
85 - 100 % |
85 - 100 % |
| Restart Capability: |
No |
No |
Engine Size:
Length / Diameter |
12.7 /
6.4 ft
3.9 / 2.0 m |
8.0 /
4.6 ft
2.4 / 1.4 m |
| Flight Status |
Flight Qualified |
Development |
| Launch Vehicles: |
Zenit Second Stage
Development - Pioneer Rocketplane |
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