Sukhoi PAK FA
 The Sukhoi PAK FA (Russian: Сухой ПАК ФА Russian: Перспективный авиационный комплекс фронтовой авиации Perspektivny Aviatsionny Kompleks Frontovoy Aviatsii literally Prospective Airborne Complex of Frontline Aviation) is a twin-engine jet fighter being developed by Sukhoi for the Russian Air Force.