Kuznetsov NK-6

NK-6
Type	Turbofan
National origin	Soviet Union
Manufacturer	Kuznetsov Design Bureau
First run	May 1958

The Kuznetsov NK-6 was a low-bypass afterburning turbofan engine, designed by the Kuznetsov Design Bureau.

Development

Development of the NK-6 started in 1955 at the Kuznetsov Design Bureau.^[2] It was the first afterburning by-pass engine made in the Soviet Union.^[1] With a maximum thrust of 216 kN (49,000 lbf), it was the most powerful jet engine in the world in the early 1960s.^[2] Despite this fact, development of the NK-6 was halted in July 1963.^[2] The accumulated experience of the NK-6 project was subsequently used in the development of the NK-144.^[2]

A modified version of this engine, the NK-7, was intended for the Soviet Navy^[1] and had a takeoff thrust of 216 kN (49,000 lbf).

Applications

Project "106"^[3] (proposed)
Tupolev Tu-95LL (testbed)
Tupolev Tu-123^[4] (proposed)
Tupolev Tu-125^[1] (proposed)
Tupolev Tu-135^[3] (proposed)

Specifications (NK-6)

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

General characteristics

Type: Two-spool low-bypass afterburning turbofan
Length: 4,810 mm (189 in)
Diameter: 1,750 mm (69 in)
Dry weight: 3,200 kg (7,100 lb)

Components

Compressor: 4-stage LP,^[1] 6-stage HP^[1]
Combustors: Annular multi-nozzle combustion chamber^[1]
Turbine: 1-stage HP,^[1] 2-stage LP^[1]

Performance

Maximum thrust:
- 216 kN (49,000 lbf)^[1] at takeoff
- 196.2 kN (44,100 lbf)^[1] in cruise with afterburner
- 34.3 kN (7,700 lbf)^[1] in cruise without afterburner
Overall pressure ratio: 13.4^[1] at takeoff
Bypass ratio: 1.79^[1]
Air mass flow: 343 kg/s (760 lb/s)^[1]
Turbine inlet temperature: 1,400 K (1,130 °C; 2,060 °F)^[1]
Specific fuel consumption:
- 183.6 kg/(kN⋅h)^[1] at takeoff
- 200 kg/(kN⋅h)^[1] in cruise with afterburner
- 87.7 kg/(kN⋅h)^[1] in cruise without afterburner

References

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r ^s ^t Otechestvennaya aviatsionno-kosmicheskaya tekhnika - SAMARSKIY NTK (in Russian). Samara, Russia: SNTK imeni N.D.Kuznetsova. pp. 23, 24, 73.
^ ^a ^b ^c ^d "Tot samyy "NK"". engine.aviaport.ru (in Russian). Nikolay Aleksandrov. Retrieved 4 October 2021.
^ ^a ^b "NK-6". airbase.ru. Retrieved 13 October 2021.
^ "Tupolev Andrei Nikolaevich". www.aviation.ru. Archived from the original on 2011-06-05. Retrieved 13 October 2021.

[САМАРСКИЙ_НТК-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r ^s ^t Otechestvennaya aviatsionno-kosmicheskaya tekhnika - SAMARSKIY NTK (in Russian). Samara, Russia: SNTK imeni N.D.Kuznetsova. pp. 23, 24, 73.

[engine.aviaport.ru-2] "Tot samyy "NK"". engine.aviaport.ru (in Russian). Nikolay Aleksandrov. Retrieved 4 October 2021.

[airbase.ru-3] "NK-6". airbase.ru. Retrieved 13 October 2021.

[aviation.ru-4] "Tupolev Andrei Nikolaevich". www.aviation.ru. Archived from the original on 2011-06-05. Retrieved 13 October 2021.

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