History
The Sukhoi Su-30 Flanker-C is a two-seat, twin-engine, multi-role fighter for all-weather, air-to-air, and air-to-surface deep interdiction missions, developed by Russia's Sukhoi Aviation Corporation. The Su-30 started out as an internal development project in the Sukhoi Su-27 family. The design plan was revamped and the name was made official by the Russian Defense Ministry in 1996.
While the original Su-27 had good range, it still did not have sufficient range for the Soviet Air Defense Forces, which needed to cover the vast expanse of the Soviet Union. The development began in 1986 on the Su-27PU, an improved-capability variant of the Su-27 capable of serving as a long-range interceptor or airborne command post. The two-seat Su-27UB combat trainer was selected as the basis for the Su-27PU, because it had the performance of a single-seat Su-27 and long-range missions require two crew members.