Sukhoi Su-57 Powerplant Development Marks Significant Mile in Russia's Advanced Combat Aircraft Program

Russia’s state-owned defense conglomerate Rostec announced on December 22, 2025, that a Sukhoi Su-57 flew for the first time powered by the new ‘Product 177’ engine. The flight was conducted by test pilot Roman Kondratyev and proceeded normally, according to the company. According to Rostec, the Product 177 engine produces up to 16,000 kilograms-force of thrust (roughly 35,000 pounds of thrust) in afterburner and offers reduced fuel consumption, along with improved durability. The development marks a significant milestone in Russia’s advanced combat aircraft program, which aims to introduce upgrades to engines, avionics, and weapons as the aircraft evolves.