The Kuznetsov NK-89 was an experimental alternative fuel turbofan engine, designed by the Kuznetsov Design Bureau.
| NK-89 | |
|---|---|
| Type | Turbofan |
| National origin | Soviet Union |
| Manufacturer | Kuznetsov Design Bureau |
| First run | 1989[1] |
| Major applications | Tupolev Tu-155 Tupolev Tu-156[2] |
| Developed from | NK-88 |
Development edit
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 edit
- Tupolev Tu-155 (testbed)
- Tupolev Tu-156M[2] (proposed)
- Tupolev Tu-156S[2] (proposed)
Specifications (NK-89) edit
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
Performance
- Maximum thrust: 103 kN (23,000 lbf)[1]
- Specific fuel consumption: 75.2 kg/(kN·h)[1] in cruise on LNG
See also edit
Comparable engines
Related lists
References edit
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