Ivchenko Progress D-27

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The Iwtschenko Progress D-27 is a turboprop engine that was developed by the Ukrainian manufacturer Iwtschenko Progress in cooperation with OAO Motor-Sitsch . The most striking feature are the two coaxial propellers rotating in opposite directions. The front propeller has eight blades and the rear six. It is one of the most powerful propeller engines ever, only the Kuznetsov NK-12 from the 1960s is more powerful, and the EPI TP400 for the Airbus A400M has similar performance data.

D-27 mounted on An-70

history

In the 1980s, the turboprop engine was derived from the D-36 (via the D-136 and D-236 engines). The crescent-shaped propellers of the Stupino SW-27 type were developed by Aerosila and are made of composite material. The engine is used on the prototype of the Antonov An-70 . It was also intended for the planned aircraft Antonov An-180 and Jakowlew Jak-44 .

Propfan or turboprop?

There is a discourse on the question of whether it is a pure turboprop or a so-called propfan engine . A turboprop engine draws its propulsion almost exclusively from the propellers, while in a propfan engine the exhaust jet of the engine generates a large part of the propulsion. With the D-27, however, the exhaust jet does not seem to contribute significantly to the propulsion.

Technical specifications

The three-shaft turbine has a three-stage high-pressure compressor with two axial and one radial stages, as well as a five-stage low-pressure compressor; both compressors are driven by a single-stage high or low pressure turbine; a four-stage power turbine follows .

Parameter Data
Manufacturer Ivchenko Progress
diameter 1.37 m
length 4.20 m
Weight 1650 kg
Propeller diameter 4.49 m
Propeller speed at takeoff 1000 rpm
Propeller speed in flight 850 rpm
power 10,440 kW (14,194 hp)

Web links

Commons : Progress D-27  - Collection of images, videos and audio files

Individual evidence

  1. ↑ An-70's uncertain future. aeronautics.ru, 2003, archived from the original on September 25, 2006 ; accessed on April 11, 2009 .
  2. ↑ Turbopropfan> D-27. Jane's Defense, accessed April 11, 2009 .
  3. ↑ Venik's Aviation. Venik's Aviation, archived from the original on September 25, 2006 ; accessed on April 11, 2009 .
  4. ↑ Close-up of the D-27 on an An-70. airliners.net, accessed on January 4, 2009 .