Sukhoi Su-57

Su-57
A T-50 prototype for the Su-57 flies at the MAKS 2011 air show
Role	Stealth air superiority fighter
National origin	Russia
Manufacturer	Sukhoi
First flight	29 January 2010
Introduction	2019 (planned)
Status	Final flight testing/pre-production
Primary users	Russian Air Force Russian Navy
Produced	2009–present
Number built	10 flyable prototypes
Program cost	US$8–10 billion (est.)
Unit cost	T-50: US$50 million
Variants	Sukhoi/HAL FGFA

The Sukhoi Su-57 (Russian: Сухой Су-57) is the designation for a stealth, single-seat, twin-engine multirole fifth-generation jet fighter being developed for air superiority and attack operations. The aircraft is the product of the PAK FA (Russian: ПАК ФА, short for: Перспективный авиационный комплекс фронтовой авиации, translit. Perspektivny Aviatsionny Kompleks Frontovoy Aviatsii, lit. '"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. The Su-57 will be the first aircraft in Russian military service to use stealth technology.

The fighter is designed to have supercruise, supermanoeuverability, stealth, and advanced avionics to overcome the prior generation fighter aircraft as well as ground and naval defences. The Su-57 is intended to succeed the MiG-29 and Su-27 in the Russian Air Force.

The prototypes and initial production batch are to be delivered with a highly upgraded variant of the Lyulka AL-31 engine used by the Su-27 family as interim powerplant while a new clean-sheet design engine is currently under development. The aircraft is expected to have a service life of up to 35 years. The prototype first flew on 29 January 2010 and deliveries of production aircraft to the Russian Air Force are to begin in 2019.