The Ivchenko Progress AI-25 is a twin-shaft turbofan engine from the Soviet manufacturer Ivchenko Progress , which was developed for the Jak-40 short-haul airliner . It was the first bypass engine to be used in the USSR for short-haul aircraft. The unit is still being produced in the 2E series by the Ukrainian aircraft engine manufacturer Motor Sitsch .
Series production started in 1967 at plant No. 478 in Zaporozhye and since then over 9,360 units in the variants AI-25 , AI-25TL , AI-25TLK and AI-25TLSch have been delivered. The engine is used in the following aircraft types:
- Length: 3350 mm
- Diameter: 1000 mm
- Empty weight: 350 kg
- Compressor: Axial, 3 low pressure compressor stages, 9 high pressure compressor stages
- Combustion chamber: ring-shaped
- Turbine: 2 high pressure turbine stages, 1 low pressure turbine stage
- Maximum thrust: 16.9 kN
- Total print ratio: 9.5: 1
- Specific fuel consumption: 58.6 kg / (kN h)
- Thrust-to-weight ratio: 4.9: 1
- AI-25, Series 2E; Used on passenger aircraft for short and medium routes
- Ulf Gerber: The great book of Soviet aviation 1920–1990 . Rockstuhl, Bad Langensalza 2019, ISBN 978-3-95966-403-5 , p. 377 .
- deagel.com: AI-25
- Gas Turbine Engines. Aviation Week & Space Technology Source Book 2009 . P. 120.
- Motor-Sitsch manufacturer's website http://www.motorsich.com/eng/products/aircraft/tde/ai-25tl/