Progress D-27

D-27
D-27
	Progress D-27 propfan engine installed on an Antonov An-70 military airlifter at the 1997 MAKS Air Show.
Type	Propfan
National origin	Soviet Union
Manufacturer	Ivchenko-Progress (design); NPC Saljut and Motor Sich (manufacture); Aerosila (propeller and gearbox);
First run	1988
Major applications	Antonov An-70; Antonov An-180; Beriev A-42;
Number built	20 (2001)
Developed from	Lotarev D-36

The Progress D-27 is a three-shaft propfan engine developed by Ivchenko Progress, and manufactured by Motor Sich in Ukraine. The gas generator was designed using experience from the Lotarev D-36 turbofan. The D-27 engine was designed to power more-efficient passenger aircraft such as the abandoned Yakovlev Yak-46 project, and it was chosen for the Antonov An-70 military transport aircraft. As of 2019, the D-27 is the only contra-rotating propfan engine to enter service.