The advanced propulsion unit surpasses all its predecessors and many equivalent foreign products in its performance

Photo: United Engine Corporation

Rostec’s United Engine Corporation has first showcased the fifth generation 177S engine and its improved modification at Dubai Airshow 2025. The advanced propulsion units surpass equivalent foreign products in their performance and may be used in existing and future aircraft.

The new product is classified as a fifth generation system and substantially surpasses its predecessors and many equivalent foreign products in its performance. The 177S provides up to 14.5 tons of thrust, while the operating time is three times higher, i.e. the engine life has been considerably increased compared with the previous generation engines. 

The implemented design solutions provide increased thrust with the same dimensions and weight as those of the baseline AL-31F/FP mounted on the Su aircraft. Thus, the 177S may be used instead of previously supplied engines without any modifications. The operating time of the propulsion unit is 6,000 hours. The engine thrust may be additionally increased when the operating time requirement is reduced. 

Fuel consumption in all operating conditions has been reduced by 7% due to new engineering solutions. Thus, operating cost may be reduced, flight range may be increased and the capability to perform complex aerobatic figures may be expanded. In addition, the engine provides increased power supply to the avionic systems of modern aircraft.