The Su-27 (NATO designation Flanker) is the front-line fighter aircraft designed by the Sukhoi Design Bureau. The export version is the Su-27SK. The aircraft is equipped to operate autonomously in combat over hostile territory, in escort of deep-penetration strike aircraft and in the suppression of enemy airfields. The aircraft provides general air defence in cooperation with ground and airborne control stations. A naval variant with folding wings is designated the SU-33.
Su-27 entered production in 1982 and is in service with Russia, Ukraine, Belarus, Kazakhstan and Vietnam, and is built under license in China as the F-11. A variant, the Su-30MK, has been sold to India with licensed local production. 50 aircraft have been ordered and the first entered service with the Indian Air Force in September 2002. China has ordered 38 two seat Su-30MKK.