RD-180
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): 2.72
Cycle: Staged Combustion
Chambers: 2
Thrust (vac.): 4150 kN
Thrust (s.l.): 3830 kN
Throttle: 47% to 100%
ISP (vac.): 337 s
ISP (s.l.): 309 s
Chamber Pressure: 3870 psi
Nozzle Ratio: 36.87
Burn time: 270 sec
Ignitions: 1
Mass: 5480 kg
Length: 3.56 m
Diameter: 3.15 m
Used in: Atlas III, Atlas V
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