Sukhoi Su-35 The initial success of this project led Sukhoi in December 2003 to proceed with a follow-up modernization programme. Known internally as T-10BM, the programme was aimed at a more thorough redesign of the airframe to narrow the qualitative gap between Russian aircraft and foreign so-called fourth-generation aircraft. The resultant design, also designated Su-35, would serve as an interim solution pending the introduction of the Sukhoi Su-57 fifth-generation fighter, many features of which the aircraft would incorporate. Additionally, the aircraft was to be a single-seat alternative to the two-seat design of the Su-30MK on the export market. In many respects, the
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