Sukhoi T-49 Sukhoi T-49 The Sukhoi T-49 was a prototype Soviet fighter aircraft. The Sukhoi T-49 is a modernized version of the Sukhoi Su-11 with new radar and modified armament. The project was officially launched on August 6, 1957, the maiden flight of the T-49 prototype took place, after various rolling tests in October 1959, in January 1960. In the development of the T-49, the delta wing, the tail and the cigar-shaped hull were taken over by the Su-11. A key differentiator to the predecessor model is the extended nose of the aircraft to accommodate the more powerful radar. Since this was
Sukhoi Su-15 the Su-15 was abruptly retired from the new Russian Air Force in 1993 to comply with the Treaty on Conventional Armed Forces in Europe. Most were hastily scrapped in favour of more advanced interceptors, including the Su-27 and MiG-31, but some are in reserve storage for emergency use. In Ukraine, the last Su-15s (at Kramatorsk and Belbek) were withdrawn from use in 1996. Some Western reports indicate that the Su-15TM was also designated Su-21 and the Su-15UM Su-21U. These reports are apparently incorrect. Designation Su-21 was reserved for Su-17M4 but never used. Sukhoi Su-15 The Sukhoi Su-15 (NATO reporting name: