RD-191
Type: Lower Stage Engine
Country of Origin: Russia
Manufacturer: NPO Energomash
First Flight:
Status: Active
Propellant (O/F): Liquid Oxygen/Kerosene
Mixture Ratio (O/F by mass): 2.6
Cycle: Staged Combustion
Chambers: 1
Thrust (vac.): 2090 kN; 1667 kN (RD-151)
Thrust (s.l.): 1920 kN
Throttle: 27% to 105%
ISP (vac.): 337 s
ISP (s.l.): 310.7 s
Chamber Pressure: 3740 psi
Nozzle Ratio: 36.87
Burn time: 325 sec
Ignitions: 1
Mass: 2290 kg
Length: 4.0 m
Diameter: 1.45 m
Used in: Angara 1.2, Angara 5, Antares 200 series (as RD-181), Naro-1 (as RD-151)
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