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Sukhoi Su-17
The Sukhoi Su-17 (NATO reporting name: Fitter) is a Soviet variable-sweep wing fighter-bomber developed from the Sukhoi Su-7. It enjoyed a long career in Soviet, later Russian, service and was widely exported to Eastern Bloc, Middle Eastern air forces and Latin America as the Su-20 and Su-22. It is the first swept-wing airplane of Russian/Soviet origin. The Su-17 set a number of world records.
==Development==
Seeking to improve low-speed and take-off/landing performance of the Su-7B fighter-bomber, in 1963 the Sukhoi OKB with input from TsAGI created a variable-sweep wing technology demonstrator. The Su-7IG (internal designation S-22I, NATO designation "Fitter-B"), converted from a production Su-7BM, had fixed inner portions of the wing with movable outer segments which could be swept to 28°, 45°, or 62°.〔Green and Swanborough 2001.〕 A fixed inner wing simplified construction, allowing the manufacturer to retain the Su-7 landing gear and avoiding the need for complex pivoting underwing hardpoints, and it minimized the shift in the center of pressure relative to the center of mass with change in wing sweep.〔("Sukhoi Su-17." ) ''Sukhoi Company Museum.'' Retrieved: 15 April 2007.〕 The new wing also had extensive leading-edge slats and trailing-edge flaps. Su-7IG first flew on 2 August 1966 with V. S. Ilyushin at the controls, becoming the first Soviet variable geometry aircraft.〔 Testing revealed that take-off and landing speeds had decreased by compared to the conventional Su-7.〔
The production aircraft was named Su-17 (NATO designation "Fitter-C", factory designation S-32) and was unofficially dubbed ''Strizh'' (Стриж, martlet) in service. Aside from the new wing, it differed from its predecessor Su-7 in having a new canopy and a dorsal fuselage spine for additional fuel and avionics. The Su-17 first flew on 1 July 1969 with E. K. Kukushev at the controls.〔
A total of 2,867 Su-17 and its variants were built, of which 1,165 were exported to 15 nations.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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