Sukhoi Aircraft

The Sukhoi Su-17 (NATO reporting name: Fitter) is a Soviet variable-sweep wing fighter-bomber developed from the Sukhoi Su-7.

Sukhoi Su-7/17/22 Fitter

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°. 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.[2] 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.[2] Testing revealed that take-off and landing speeds had decreased by 50–60 km/h (31–37 mph) 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

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However, the AL-21F engine proved tolerant of routine ingestion of sand and sand-contaminated fuel and by 1985 the combat readiness of the Su-17 fleet exceeded that of the Sukhoi Su-25 and the helicopters.[3] The first-series Su-17s were quickly replaced with more capable Su-17M3 and Su-17M4. Despite its durability and payload, the aircraft proved ill-adapted for combat in the mountainous terrain due to high attack speeds, low maneuverability, and the need to stay out of range of anti-aircraft artillery due to lack of significant armor protection. Although external armor was added around the engine, hydraulics, and fuel systems based on damage analysis, this was still insufficient compared to dedicated close air support Su-25s

Sukhoi
Sukhoi SU-22 Fitter

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, Arab air forces, Angola and Peru as the Su-20 and Su-22. It is the first variable-sweep wing of Russian/Soviet origin.

  • History

    Role Fighter-bomber

    National origin Soviet Union

    Manufacturer Sukhoi

    First flight 2 August 1966

    Introduction 1970

  • Primary User

    Status In limited service

    Primary users Syrian Air Force

    Iranian Air Force

    Polish Air Force

    Peruvian Air Force

    Vietnam People's Air Force

  • Variants

    Produced 1969–1990

    Number built 2,867

    Developed from Sukhoi Su-7

     

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Sukhoi SU-17/22 Fitter

Aircrafttotaal

The Sukhoi Su-17 (NATO reporting name: Fitter) is a Soviet variable-sweep wing fighter-bomber developed from the Sukhoi Su-7.