Progress D-27

From Wikipedia, the free encyclopedia
Jump to: navigation, search
D-27
Progress D-27 propfan (Antonov An-70).jpg
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.

Design and development[edit]

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[edit]

Specifications (D-27)[edit]

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

See also[edit]

Comparable engines
Related lists

References[edit]

External links[edit]