The first aircraft design to receive the Su-35 designation had its origins in the early 1980s, as the Su-27 was just being introduced into service with the Soviet Armed Forces.
The Sukhoi Su-35 is the NATO reporting name Flanker-E is the designation for two improved versions of the Su-27 air-defense fighter both designed by the Sukhoi Design Bureau and built by the Komsomolsk-on-Amur Aircraft Plant.
The type was originally developed by the Soviet Union from the Su-27 and was known as the Su-27M. It incorporated canards and a multi-function radar giving it multi-role capabilities.
The first prototype made its maiden flight in June 1988. Following the dissolution of the Soviet, Union Sukhoi re-designated it as the Su-35 to attract export orders. Fourteen aircraft were produced and used for tests and demonstrations; one example had thrust-vectoring engines and was, in turn, redesignated the Su-37. A sole Su-35UB two-seat trainer was also built in the late 1990s that resembled the Su-30MK family.
In 2003, Sukhoi embarked on a second modernization of the Su-27 to serve as an interim aircraft awaiting the development of the Sukhoi PAK FA (Su-57) program. Also known as the Su-35, this version has a redesigned cockpit and weapons-control system and features thrust-vectoring engines in place of the canards.
The type made its first flight in February 2008.
Although it was designed for export, the Russian Air Force became the launch customer in 2009, with the production version designated Su-35S.