The Sukhoi Su-35 (Russian: Сухой Су-35, NATO reporting name: Flanker-E) is a single-seat, twin-engined supermaneuverable multirole fighter. It is a derivative of the Su-27 'Flanker', and was initially known as the Su-27M. More than a dozen of these were built with some used by the Russian Knights aerobatic demonstration team. The Su-35 had been offered to many countries, including India, Brazil and South Korea.
In the 1980s, Sukhoi was looking to upgrade its high-performance Su-27. The resultant Su-35 embodies aerodynamic refinements to give it more manoeuvrability, greatly enhanced avionics, longer range, and a more powerful engine. The first prototype, converted from a production Su-27, made its maiden flight in June 1988. The Su-35 was further developed into the Su-37, which has thrust-vectoring capabilities, and the Su-35BM, classified as 4++ generation fighter by its manufacturer. The new model entered into serial production as the Su-35S for the Russian Air Force in 2010.