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-Gulfstream S-21 speeds. As of 2012, the project had not received any funding for the 2013-2025 development period and appeared to be cancelled. Sukhoi-Gulfstream S-21 Sukhoi-Gulfstream S-21 was a projected Russian-American supersonic business jet. In the early 1990s, Gulfstream Aerospace and the Sukhoi Design Bureau began a joint effort to develop a supersonic small business jet, code named the S-21. Due to questionable market demand for commercial supersonic air travel, commitment to the project weakened and delays mounted. Gulfstream eventually dissolved the partnership, although Sukhoi continued work on the S-21. The S-21 would be capable of sustained cruise at Mach 2+ and