The Kuznetsov NK-89 was an experimental alternative fuel turbofan engine, designed by the Kuznetsov Design Bureau.

Development

The NK-89 was a modified version of the hydrogen-powered NK-88[1] and was designed to run on both liquified natural gas[2] (LNG) and kerosene.[2] It was intended for use on the proposed Tupolev Tu-156,[2] a modified version of the Tupolev Tu-154B.[2] This aircraft was to have cryogenic tanks in the rear of the cabin and forward baggage hold to store the LNG.[2] Kerosene would be carried in the wing tanks.[2] In January 1989, a test flight of a prototype of this engine was carried out onboard of the Tupolev Tu-155 flying laboratory where LNG was used as fuel.[1]

By default, the engine would run on LNG,[2] but kerosene could be used when flying out of airports where LNG is unavailable[2] or in case of emergency.[2] The switch from LNG to kerosene could be made in-flight in 5 seconds.[2]

Applications

• Tupolev Tu-155 (testbed)
• Tupolev Tu-156M[2] (proposed)
• Tupolev Tu-156S[2] (proposed)

Specifications (NK-89)

Data from Otechestvennaya aviatsionno-kosmicheskaya tekhnika - SAMARSKIY NTK[1] and janes.migavia.com[2]

General characteristics

• Type: Two-spool alternative fuel turbofan
• Length:
• Diameter:
• Dry weight:

Components

• Compressor:
• Fuel type: LNG[1][2] or kerosene[2]

Performance

• Maximum thrust: 103 kN (23,000 lbf)[1]
• Specific fuel consumption: 75.2 kg/(kN·h)[1] in cruise on LNG
• Power-to-weight ratio:

See also

Comparable engines

• Kuznetsov NK-88
• Reaction Engines Scimitar

Related lists

• List of aircraft engines

References

This aircraft engine article is missing some (or all) of its specifications. If you have a source, you can help Wikipedia by adding them.