Progress, Propfan D-27 © Konstantinos Panitsidis

Photos from the personal collection of Konstantinos Panitsidis

 Technical specifications      Photos      Video



This engine is mainly intended for the Antonov, An-70, An-70T, An-180 and Beriev Be-42 aircraft, but also for aircraft with a low fuel consumption requirement, such as passenger aircraft.

The Progress D-27 Propfan turboprop engine has a contra-rotating propellers, SV-27 type variable pitch propellers of Russian origin and made entirely of composite materialы with a diameter of 4.5 meters.

Its front row is equipped with eight propellers and the rear row has six. All this combination yields a maximum power of 14,000 horsepower (each engine). In addition to these, the engine has the lowest fuel consumption (130 grams for every ton of cargo per kilometer).


SV-27  - propeller (propfan)

Diameter of contra-rotating propellers 4500 mm. Rotational frequency take-off condition 1000 RPM. Weight 1100 kg. Take-off power 13400 h.p. Thrust (Vfl=0) 12150 kgf.


The design parameters (characteristics) of the D-27 have:
parameter stability ( very low fuel consumption in all operating phases high reliability)
long service life
low labor intensity of manufacturing and maintenance
low emission of pollutants
permissible noise level



Fuel (Aviation grade kerosene) RT
Oil -
Propeller shaft power, take-off power rating 14.000 e.h.p.
Specific fuel consumption, take-off power rating 0,170 kg/e.h.p.*h
Propeller shaft power, cruise power  6.750 e.h.p
Specific fuel consumption, cruise power (H=11.000 m, M=0,7) 0,130 kg/e.h.p.*h
Pressure ratio, take-take-off power rating 22,9
Pressure ratio, cruise power 29,7
Temperature of the gas at the turbine intake, take-off power rating 1.640 K
Temperature of the gas at the turbine intake, cruise power 1.450 K
Air flow rate, take-off power rating 27,7 kg/s
Air flow rate, cruise power 24,4 kg/s
Air flow rate, cruise power maximum 12,1 kg/s
Compressor rotation frequency low-pressure, take-off power rating -
The rotational speed of the propfan turbine take-off mode 8.934 rpm
Power-weight ratio 8,485 h.p/kgf
Energy conversion efficiency (Mf=0) 0,9
Diameter propellers 4500 mm
Weight (without the non-rotating propellers, high distortion) 1.650 kg
Lenght 4198 mm
Height 1370 mm
Width 1260 mm
Engine diameter 1370 mm
Specified service life 18000 h
Overhaul operation time (TBO) 6000 h


PHOTOS Propfan D-27