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Two aircraft share the designation Su-17. This article deals with the aircraft that reached operational status in the 1970s. For the earlier aircraft, see Sukhoi Su-17 (1949).
The Sukhoi Su-17 (NATO reporting name: "Fitter") was a Soviet attack aircraft developed from the Su-7 interceptor. Around 3,000 of the Su-17 and its derivatives were built between 1966 and 1991, and the type was widely exported to Eastern Bloc and Middle-Eastern airforces. Export versions are designated the Su-20 (equivalent to the Soviet Su-17M) and Su-22 (equivalent to the Soviet Su-17M2, M3, and M4)
The Su-17 began as an attempt to improve the performance of the Su-7. The most drastic change was changing the earlier aircraft's delta wing to a variable geometry wing, with only the outer panels moveable. A Su-7 was modified into this configuration and flew on August 2 1966 as the Su-7IG (изменяемой геометрии - izmenyaemoi geometrii, "variable geometry") (aka S-22I). The results were very pleasing, an aircraft with twice the warload and 30% more range and able to take off with only half the runway. Soviet Air Force units started to be equipped with the type from 1972 onwards.
Comparable aircraft:
Designation sequence: Su-10 - Su-11 - Su-15 - Su-17 - Su-20 - Su-21 - Su-22 - Su-24 - Su-25 - Su-26
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