Progress D-27

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D-27
Progress propfan on the Antonov An-70
Type	Propfan
National origin	Ukraine
Manufacturer	Ivchenko-Progress
First run	1992
Major applications	Antonov An-70 Beriev A-42PE Antonov An-180
Number built	16[1]
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 furthermore 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.

Contents

• 1 Design and development
• 2 Applications
• 3 Specifications (D-27)
  • 3.1 General characteristics
  • 3.2 Components
  • 3.3 Performance
• 4 See also
• 5 References
• 6 External links

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 is no mass-produced aircraft that is powered by the D-27.

Applications

• Antonov An-70
• Beriev A-42PE
• Antonov An-180 (not built)
• Yakovlev Yak-44 (not built)

Specifications (D-27)

Data from forecastinternational.com^[1][2]

General characteristics

• 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)
• Diameter:
• Dry weight: 1,650 kilograms (3,638 lb)

Components

• Compressor: Low-pressure five-stage, axial flow and high-pressure 2 axial and single centrifugal stages ^[3]
• Combustors: Annular combustion chamber
• Turbine: Single-stage high-pressure, single-stage low-pressure

Performance

• Maximum power output: 14,000 horsepower (10,440 kW)
• Power-to-weight ratio: 6.33 kW/kg (3.85 hp/lb)

See also

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

• List of aircraft engines