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Aerojet (and Kuznetsov)

AJ26-NK33A

Developed from a venerable Russian rocket engine, the NK33A combines Russian robust design and reliability with American performance enhancements and manufacturing capability. AJ26-NK33A
Engine statistics
Specification
Applications Soviet N-1 moon rocket (1970), Kistler K-1 RLV (present)
Propellants LO2/HC
Thrust in Vacuum 339,000 lbf
Thrust at Sea Level
Isp in vacuum(s) 331
Isp at sea level 297
Mixture Ratio 2.6:1
Weight 2725 lb
Chamber Pressure 2109 psia
Expansion Ratio ????
Engine Cycle ????
Pump Design Pressures ????