Russia’s Su-57 fighter with fifth-generation engine begins flight tests - RUSSIAN AVIATION

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Russia’s Su-57 fighter with fifth-generation engine begins flight tests

Russian Aviaton » Monday December 22, 2025 10:33 MSK

Russia’s Sukhoi Su-57 fighter equipped with the advanced fifth-generation "Product 177" engine has performed its first flight, the state-run corporation Rostec announced.

"Specialists of the United Aircraft Corporation (UAC) and the United Engine Corporation (UEC) (parts of Rostec) have begun flight tests of the "Product 177" engine mounted on the Su-57 fifth-generation aircraft. Honored Test Pilot of Russia Roman Kondratyev flew the aircraft. The flight proceeded normally, in accordance with the flight mission," the state corporation reported.

It said that the new engine was developed by UEC specially for use in fifth-generation aircraft systems. "The latest engine has afterburning thrust of 16,000 kgf (kilogram-force - TASS). The new engine also features low fuel consumption in all modes and enhanced durability," Rostec said.

The state corporation added that UAC is currently implementing a program to expand production capacity, which will allow it to increase the volume of Su-57 aircraft deliveries to the military and offer an export version of the fighter to foreign customers.

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