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The Kuznetsov NK-4 is a turboprop engine, designed by the Kuznetsov Design Bureau.

Development

Development of the NK-4 began on September 27, 1955 at the Kuznetsov Design Bureau. Factory tests were passed on April 17, 1956 and state tests were passed in 1957. At the time, the NK-4 was considered an economical and technologically advanced engine.

A modified version of the NK-4 that improved in terms of service life and efficiency, the NK-4A, passed factory tests in October 1957. State tests of the NK-4A were passed in June 1959.

Applications

• Antonov An-10 (prototype)
• Ilyushin Il-18A

Specifications (NK-4)

Data from Otechestvennaya aviatsionno-kosmicheskaya tekhnika - SAMARSKIY NTK

General characteristics

• Type: Turboprop engine
• Length: 2.77 m (9 ft 1 in)
• Diameter:
• Dry weight: 970 kg (2,140 lb) without propeller

Components

• Compressor:

Performance

• Maximum power output:
  
  • 2,944 kW (3,948 hp) at takeoff
  • 1,580 kW (2,120 hp) in cruise
• Overall pressure ratio: 7.9
• Turbine inlet temperature: 1,250 K (980 °C; 1,790 °F)
• Specific fuel consumption:
  
  • 0.333 kg/(kW⋅h) at takeoff
  • 0.285 kg/(kW⋅h) in cruise

See also

Comparable engines

• Ivchenko AI-20

Related lists

• List of aircraft engines

References

1. ^ Otechestvennaya aviatsionno-kosmicheskaya tekhnika - SAMARSKIY NTK (in Russian). Samara, Russia: SNTK imeni N.D.Kuznetsova. pp. 21, 72.
2. Gordon, Yefim; Dmitry Komissarov (2004). OKB Ilyushin. Sergey Komissarov (1st ed.). Hinkley: Midland publishing. pp. 193–251. ISBN 1-85780-187-3.

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• 1950s turboprop engines
• Kuznetsov aircraft engines