RD-263
Type: Lower Stage Engine
Country of Origin: Russia
Manufacturer: NPO Energomash, PA Yuzhmash
First Flight:
Status: Active (as RD-264)
Propellant (O/F): Nitrogen Tetroxide/Unsymmetrical Dimethylhydrazine
Mixture Ratio (O/F by mass): 2.67
Cycle: Staged Combustion
Chambers: 1
Thrust (vac.): 1128 kN
Thrust (s.l.): 1040 kN
Throttle: none
ISP (vac.): 318 s
ISP (s.l.): 293 s
Chamber Pressure: 2990 psi
Nozzle Ratio:
Burn time:
Ignitions: 1
Mass: 870 kg
Length: 2.15 m
Diameter: 1.08 m
Used in: Dnepr (as RD-264 – a set of four RD-263)
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