Kuznetsov NK-8

The NK-8 was a low-bypass turbofan engine built by the Kuznetsov Design Bureau, in the 90 kN (20,000 lb_f) thrust class. It powered production models of the Ilyushin Il-62 and the Tupolev Tu-154A and B models.

NK-8
Type	Turbofan
National origin	Soviet Union
Manufacturer	Kuznetsov Design Bureau
First run	1961
Major applications	Ilyushin Il-62 Tupolev Tu-154
Developed into	Kuznetsov NK-86 Kuznetsov NK-88 Kuznetsov NK-144

Variants

NK-8-2

93.2 kN (20,950 lbf) (Tupolev Tu-154)

NK-8-2U

103.00 kN (23,155 lbf) (Tupolev Tu-154)

NK-8-4

103.0 kN (23,150 lbf) (Ilyushin Il-62)

Applications

• Ilyushin Il-62
• Tupolev Tu-154

Specifications (NK-8-2)

An installed NK-8

Data from Jane's all the World's Aircraft 1982–83.^[1]

General characteristics

• Type: Two-shaft turbofan
• Length: 4,762 mm (187.5 in)
• Diameter: 1,442 mm (56.8 in)
• Dry weight: 2,100 kg (4,600 lb)

Components

• Compressor: Two stage axial fan, two-stage IP compressor, six-stage HP compressor
• Combustors: Annular (139 burners)
• Turbine: Single-stage HP turbine, two-stage LP turbine
• Fuel type: Avtur
• Oil system: Pressure feed

Performance

• Maximum thrust: 93.2 kN (21,000 lbf) for take-off
• Overall pressure ratio: 10.8
• Bypass ratio: 1
• Turbine inlet temperature: 1,140 K (870 °C)
• Specific fuel consumption: 0.76 lb/lbf/h (77 kg/kN/h) at 11,000 m (36,000 ft) at cruise power
• Thrust-to-weight ratio: 4.53

See also

Related development

• Kuznetsov NK-86
• Kuznetsov NK-144

Comparable engines

• Pratt & Whitney JT3D
• Pratt & Whitney JT8D
• Rolls-Royce Conway
• Soloviev D-30

Related lists

• List of aircraft engines