Engine Performance
|
RD-170 / RD-171 |
RD-173 |
Propellant Combination
Oxidizer
Fuel |
Liquid Oxygen (LOX)
Rocket Propellant (RP) |
Liquid Oxygen (LOX)
Rocket Propellant (RP) |
| Engine Cycle: |
Staged Combustion |
Staged Combustion |
| Average Thrust: |
1,632,000 lb SL /
1,777,000 lb vac
7,246 kN / 7,890 kN |
1,733,000 lb SL /
1,878,000 lb vac
7,695 kN / 8,338 kN |
| Chamber Pressure: (Pc) |
3,734 psia |
3,734 psia |
| Mixture Ratio: |
2.6 : 1 |
2.6 : 1 |
| Isp: |
309 sec SL
337 sec vac |
310.9 sec SL
337.3 sec vac |
| Nozzle Area Ratio: |
36.4 : 1 |
36.4 : 1 |
| Gimbal Capability: |
8 degrees |
8 degrees |
| Engine Mass: |
19,351 lb (dry)
8,776 kg (dry) |
18,576 lb (dry)
8,425 kg (dry) |
| Engine Thrust to Weight |
80 |
80 |
| Mixture Ratio Control: |
Yes (EMA) |
Yes (EMA) |
| Throttle Range: (% Pc) |
50 - 100 % |
50 - 100 % |
| Restart Capability: |
No |
No |
Engine Size:
Length / Diameter |
13.1 /
12.2 ft
4.0 / 3.7 m |
13.1 /
12.2 ft
4.0 / 3.7 m |
| Flight Status |
Flight Qualified |
Flight Qualified |
| Launch Vehicles: |
Energia LB and
Zenit 2 First Stage |
Zenit 3SL First Stage
Angara First Stage |
* Performance and images provided by Pratt
& Whitney
|
