The Sukhoi Su-27 (Russian: Сухой Су-27) (NATO reporting name: Flanker) is a twin-engine supermanoeuverable fighter aircraft designed by Sukhoi. It was intended as a direct competitor for the large United States fourth generation fighters, with 3,530-kilometre (1,910 nmi) range, heavy armament, sophisticated avionics and high maneuverability. The Su-27 most often flies air superiority missions, but its most modern variants are able to perform almost all combat operations. Complementing the smaller MiG-29, the Su-27 has its closest US counterpart in the F-15 Eagle. The Su-27 entered service with the Soviet Air Force in 1985...