Progress D-236

D-236
The Progress D-236 propfan engine attached to the Yak-42E-LL testbed aircraft, on static display at the 1991 Paris Air Show.
TypePropfan
National originUkraine
ManufacturerIvchenko-Progress
First run1985
Major applications
Number built5
Developed fromLotarev D-136

The Progress D-236 was an experimental aircraft engine, a hybrid between a turbofan and a turboprop known as a propfan. Also known as the Lotarev D-236T, the three-shaft geared engine was designed in the 1980s and 1990s to power proposed propfan aircraft such as the Tupolev Tu-334, Ilyushin Il-118, and Ilyushin Il-88.

Based on the core of the Ukrainian Progress D-36 turbofan, the D-236 was the first Soviet propfan, and as of 2019 it is still one of only four different unshrouded, contra-rotating propfan engines to have flown in service or in flight testing.

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