Russian Su-35 fighter, T50 and A50 AWACS. The Sukhoi Su-35 (Russian: Сухой Су-35; NATO reporting name: Flanker-E) is actually two heavily-upgraded derivatives of the Su-27 ‘Flanker’. Both are single-seat, twin-engine supermaneuverable multirole fighters, designed by Sukhoi and built by Komsomolsk-on-Amur Aircraft Production Association (KnAAPO).
The first variant was designed during the 1980s, when Sukhoi was looking to upgrade its high-performance Su-27, and was initially known as the Su-27M. Later re-designated Su-35, this derivative incorporates aerodynamic refinements to increase manoeuvrability, enhanced avionics, longer range, and a more powerful engine. The first Su-35 prototype, converted from a Su-27, made its maiden flight in June 1988. More than a dozen of these were built with some used by the Russian Knights aerobatic demonstration team. The first Su-35 design was later modified into the Su-37 with thrust-vectoring engines and used as a technology demonstrator. A sole Su-35UB two-seat trainer was built in the late 1990s that, despite its name, shares a strong resemblance to the Su-30MK family.