| 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. | |
| Type | Propfan |
| National origin | Ukraine |
| Manufacturer | Ivchenko-Progress |
| First run | 1985[1][2] |
| Major applications | Tupolev Tu-334 Ilyushin Il-88 and Il-118 |
| Number built | 5[2] |
| Developed from | Lotarev 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.