Sukhoi/HAL FGFA Sukhoi/HAL FGFA The Sukhoi/HAL Fifth Generation Fighter Aircraft (FGFA) or Perspective Multi-role Fighter (PMF) was a fifth-generation fighter aircraft planned for India and Russia. It was a derivative project of the Russian Sukhoi Su-57 for the Russian Air Force. The FGFA was the earlier designation for the Indian version, while the combined project is called the Perspective Multi-Role Fighter (PMF). The completed FGFA was to include a total of 43 improvements over the Su-57, including stealth, supercruise, advanced sensors, networking and combat avionics. The Indian version would have been a two-seater with pilot and co-pilot or weapon systems operator (WSO).
Sukhoi-Gulfstream S-21 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 much research and development has gone into the management of the troublesome transonic effects phenomena associated with near Mach 1 air