NK-21

Type: Upper Stage Engine
Country of Origin: Soviet Union
Manufacturer: Kuznetsov Design Bureau

First Flight:
Status: Retired
Propellant (O/F): Liquid Oxygen/Kerosene
Mixture Ratio (O/F by mass):
Cycle:
Chambers: 1

Thrust (vac.): 402.5 kN
Thrust (s.l.):
Throttle:
ISP (vac.): 353 s
ISP (s.l.):
Chamber Pressure:
Nozzle Ratio:
Burn time:
Ignitions:

Mass:
Length:
Diameter:

Used in: N-1

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