About 50 units were manufactured. T-431 A specially modified Su-9 for setting the world record for absolute height in 1962. Sukhoi Su-11 A upgraded design based on the Su-9. It was slightly lengthened compared to the Su-9. However, it was outmoded by the Sukhoi Su-15, which offered vastly increased range and aerodynamic performance. Sukhoi Su-17 Is the first Sukhoi design to incorporate a Variable-sweep wing. The Su-17 was designed in parallel with the Su-11 but was delayed until the wing-sweeping mechanism was ready. The Su-17 exists in numerous variations and was exported to Warsaw Pact nations and other nations such as Peru (See: Peruvian Air Force). Operators Soviet Anti-Air Defense 894th Fighter Aviation Regiment, Ozernoye, Ukraine, 1959-1979. Specifications (Su-9) See also References External links Su-9 from NAPO (Novosibirsk Aircraft Production Association) Su-9 from Global Aircraft Su-9 from FAS Su-09 1950s Soviet fighter aircraft Single-engined jet aircraft Delta-wing aircraft Aircraft first flown in 1956