What You Need to Know: Despite increased production of Su-35 and Su-57 fighters, Russia's Su-35 "Flanker-E" has struggled in Ukraine ... evolution of the Soviet Su-27 Flanker.

Powering the Su-27 are two Saturn AL-31F turbofan engines, each producing over 27,500 pounds of thrust with afterburners. These engines give the Flanker a top speed exceeding Mach 2.35 (around ...