Russia’s Su-57 Flies with New Izdeliye 177 ‘Gen. 5’ Engine

The development of the Izdeliye 177 appears to be driven by the need to upgrade the earlier Su-57 production models and offer a new powerplant to international customers. Russia’s United Aircraft Corporation (UAC) announced on Dec. 22, 2025  the test flight of an Su-57 Felon (airframe T-50-052) with a new Izdeliye 177 (Russian for ‘Product […]