.jpg "Kuznetsov NK-93 Propfan engine © Konstantinos Panitsidis")
Photos from the personal collection of Konstantinos Panitsidis
Technical specifications 
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Aircraft turbopropfan engine NK-93 with ultra-high bypass ratio m=16.6 (16.7) developed by SNTK name N.D. Kuznetsov in the early 90s. Engine propfan NK-93 was mainly designed for large passenger and cargo aircraft (Il-96-500, Il-96MK, Tu-204-200, Tu-214, Tu-330, Tu-230).
The engine gas generator consists of an annular combustion chamber and has a three-shaft design: 8-stage high-pressure compressor, 7-stage axial low-pressure compressor, 1-stage high-pressure turbine, 1-stage low-pressure turbine, 3-stage propfan turbine.
At the same time, 40% of the power transmitted through the gearbox falls on the eight-blade stage, and 60% on the ten-blade stage.
With the collapse of the Soviet Union, the Kuznetsov Design Bureau ran into financial problems and the program was cancelled. According to the statement of SNTK name N.D. Kuznetsov, the program was resumed in 2014.
TECHNICAL SPECIFICATIONS
| Fuel | - |
| Oil | - |
| Max thrust take-off power rating | 18.000 kgf |
| Specific fuel consumption, take-off power rating | 0,230 kg/kgf. h |
| Max thrust, cruise power (H=11.000 m, M=0,75) | 3.200 kgf |
| Specific fuel consumption, cruise power | 0,490 kg/kgf. h |
| Pressure ratio, take-off power rating | 28,85 |
| Bypass ratio, take-off power rating | 16,6 |
| Temperature of the gas at the turbine intake, take-off power rating | 1.520 K |
| Air flow rate, take-off power rating | 228 kg/sec |
| Compressor rotation frequency low-pressure, take-off power rating | - |
| Compressor rotation frequency high-pressure, take-off power rating | - |
| Diameter | 2900 mm |
| Height | - |
| Width | - |
| Length | 5972 mm |
| Weight | 3.650 kg |
| Specified service life | - |
