|Progress propfan on the Antonov An-70|
|Major applications||Antonov An-70
|Developed from||Lotarev D-36|
The Progress D-27 is a three-shaft propfan engine developed by Ivchenko Progress. It is not clear whether the D-27 engine's core is related to or derived from the D-36 turbofan which is a three-shaft turbofan. The D-27 engine was developed specifically to power more efficient passenger aircraft such as the abandoned Yak-46 project and it was chosen to power the An-70 military transport aircraft. The D-27 is expected to be a base platform for future engine derivatives.
Design and development
The engine was developed by the Ivchenko-Progress Design Bureau for commercial and military transport aircraft. It was designed to meet the expected growth in demand for aeronautical products which include the development of a number of new aero engines of civil and military application.
D-27 is regarded as a pacesetter and perhaps a first in the world for production turbopropfan engines. It is rated at a maximum power of 14000shp. Currently, the D-27 is undergoing official flight testing as installed in medium-range military airlifter, the An-70.
In developing the D-27 engine, Ivchenko-Progress also came up with a proposal for several derivatives based on the core of the D-27 engine. For instance the following derivatives have been proposed for different purposes and at different times:
- AI-127 - a turboshaft derivative with a rated power of 14500 hp proposed for the Mil Mi-26 helicopter.
- AI-727 - a family of ultra-high bypass geared turbofan engines with a thrust of between 9000kgf and 11000 kgf.
(These are proposed to be driven by a reduction gear of noiseless wide-span fans)
The D-27’s two-shaft gas generator is made up of an axial low-pressure compressor, a mixed-flow high-pressure compressor, an annular combustion chamber, a single-stage high-pressure turbine, and a single-stage low-pressure turbine. The SV-27 contra-rotating propfan, provided by SPE Aerosila, is driven by a four-stage turbine via a shaft connected to a planetary reduction gear housing a thrust meter and mechanism to prevent rotor acceleration.
Currently, there are no mass-produced aircraft that are powered by the D-27.
- Type: Two-shaft propfan engine
- Length: 4.2 m (165.3 in)
- Width: 1.2 m (49.5 in)
- Height: 1.3 m (53.9 in)
- Propeller diameter: 4.5 m (177.1 in)
- Dry weight: 1,650 kilograms (3,638 lb)
- Compressor: Low-pressure five-stage, axial flow and high-pressure 2 axial and single centrifugal stages 
- Combustors: Annular combustion chamber
- Turbine: Single-stage high-pressure, single-stage low-pressure
- Maximum power output: 14,000 horsepower (10,440 kW)
- Power-to-weight ratio: 6.33 kW/kg (3.85 hp/lb)
- Comparable engines
- Allison 578-DX
- Europrop TP400
- General Electric GE-36 UDF
- Kuznetsov NK-12
- Rolls-Royce RB3011
- Pratt & Whitney/Allison 578-DX
- Related lists
- Russia, Central/Eastern Europe and China Turbofan and Turbojet Engines, Forecast international
- D-27 at deagel.com
- http://www.ivchenko-progress.com/welcome.do?id=168 More detailed information about D-27 engine
|Wikimedia Commons has media related to Progress D-27.|