The Sukhoi Su-57 (Russian: Сухой Су-57) is the designation intended for a stealth, single-seat, twin-engine jet multirole fighter aircraft designed for air superiority and attack operations. The aircraft is the product of the PAK FA (Russian: ПАК ФА, Russian: Перспективный авиационный комплекс фронтовой авиации, Perspektivny Aviatsionny Kompleks Frontovoy Aviatsii, literally Prospective Aviation Complex of Frontline Aviation), a fifth-generation fighter programme of the Russian Air Force. Sukhoi's internal name for the aircraft is T-50.