Kuznetsov NK-4

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

NK-4
Type	Turboprop
National origin	Soviet Union
Manufacturer	Kuznetsov Design Bureau
First run	April 1956[1]
Major applications	Ilyushin Il-18

Development

Development of the NK-4 began on September 27, 1955^[1] at the Kuznetsov Design Bureau. Factory tests were passed on April 17, 1956^[1] and state tests were passed in 1957.^[1] At the time, the NK-4 was considered an economical and technologically advanced engine.^[1]

A modified version of the NK-4 that improved in terms of service life and efficiency,^[1] the NK-4A, passed factory tests in October 1957.^[1] State tests of the NK-4A were passed in June 1959.^[1]

Applications

• Antonov An-10^[1] (prototype)
• Ilyushin Il-18A^[2]

Specifications (NK-4)

Data from Otechestvennaya aviatsionno-kosmicheskaya tekhnika - SAMARSKIY NTK^[1]

General characteristics

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

Components

• Compressor:

Performance

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

See also

Comparable engines

• Ivchenko AI-20

Related lists

• List of aircraft engines