 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.The engine was launched in 1985 by the Ivchenko-Progress Design Bureau for commercial and military transport aircraft.