Kuznetsov NK-22

The Kuznetsov NK-22 is an afterburning turbofan engine, designed by the Kuznetsov Design Bureau.

NK-22
Type	Turbofan
National origin	Soviet Union
Manufacturer	Kuznetsov Design Bureau
First run	April 1968[1]
Major applications	Tupolev Tu-22M[2]
Developed from	NK-144
Developed into	NK-23

Development

In April 1967, the Kuznetsov Design Bureau accepted an official request to create a new engine that would later be designated as the NK-22.^[2] The design of the NK-22 was based on the NK-144 engine used on the Tupolev Tu-144 SST.^[2]

The first specimen of the engine was completed on April 10, 1968^[2] and the first factory tests where passed in the same month.^[2] State tests took place in October 1970.^[2] The engines where later installed on Tu-22M0, M1, and M2 bombers.^[2] Serial production of the NK-22 started in 1969 and was terminated in 1984.^[1]

A modernised version of the NK-22, the NK-23, first ran in July 1976^[1] and was tested in flight on a Tupolev Tu-22M2 bomber.^[2] Despite having more thrust (220 kN)^[3] than its predecessor, the NK-23 was not put into serial production.^[3]

Applications

• Tupolev Tu-22M0, M1 and M2

Specifications (NK-22)

Data from airwar.ru^[4] and leteckemotory.cz^[2]

General characteristics

• Type: Two-spool low-bypass afterburning turbofan
• Length: 5,200 mm (200 in)^[4]
• Diameter: 1,500 mm (59 in)^[4]
• Dry weight:

Components

• Compressor: 12-stage axial compressor
• Combustors: Annular multi-nozzle combustion chamber
• Turbine: 3-stage turbine
• Fuel type: T-7 or RT kerosene type fuel

Performance

• Maximum thrust:
  
  • 215.76 kN (48,500 lbf)^[4] with full afterburner
  • 158.9 kN (35,700 lbf)^[4] in cruise
• Overall pressure ratio: 14.75^[2]
• Bypass ratio: 0.6^[2]
• Turbine inlet temperature: 1,087 °C (1,989 °F)^[2]
• Specific fuel consumption: 1.95 kg/(kgf⋅h)^[2] with full afterburner

See also

Comparable engines

• Kuznetsov NK-25

Related lists

• List of aircraft engines