This page no longer updated from 31 October 2001. Latest version can be found at NK-31

Manufacturer Name: NK-31. Government Designation: 11D114. Designer: Kuznetsov. Developed in: 1969-74. Application: N-1F stage 4 (block G). Used on stages: Black Colt. Used on launch vehicles: Black Colt. Propellants: Lox/Kerosene Thrust(vac): 41,000 kgf. Thrust(vac): 402.00 kN. Isp: 353 sec. Burn time: 1,200 sec. Mass Engine: 722 kg. Diameter: 1.4 m. Chambers: 1. Chamber Pressure: 92.00 bar. Area Ratio: 124.00. Oxidizer to Fuel Ratio: 2.60. Country: Russia. Status: Out of Production. First Flight: 1974. References: 351 . Comments: To have been used in the N-1F fourth (Block G translunar injection) stage. After initial failures of the N-1 Kuznetsov developed modified versions of engines for all four stages, which had multiple ignition capability and increased operational lifetime.
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Last update 12 March 2001.
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