Mikoyan/Gurevich I-360


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Mikoyan/Gurevich I-360

At the end of 1951, the MiG OKB had completed an adaptation of the MiG-17 airframe for a pair of 2600kg Mikulin AM-5 turbojets as the Izdeliye SM-1, or I-340. Purely an engine test bed, the SM-1 had demonstrated the efficacy of the side-by-side installation of the small-diameter turbojets, achieving speeds of 1193km/h at 1000m and 1154km/h at 5000m, an altitude attained in 0.94 min.

The success achieved with the SM-1 determined choice of engine and power plant arrangement for the SM-2 single-seat fighter proposal embodying an essentially similar wing to that of the I-350 with 55 sweepback at quarter chord (60 at leading edge). Powered by two AM-5F turbojets each with an afterburning rating of 2700kg and having an armament of two 37mm N-37D cannon in the wing roots, the first SM-2 - by now assigned the official designation of I-360 - was flown on 24 May 1952. This was unique in having a T-type horizontal tail, and, on 25 June, it attained Mach=1.04 in level flight. Subsequent testing revealed that the wing tended to blanket the tailplane at high angles of attack, and, to rectify this deficiency, the tailplane was lowered to a mid point on the fin. Flight test (as the SM-2A) revealed little improvement and the surface was then further lowered to the base of the fin (as the SM-2B), this being accompanied by some increase in the vertical tail surface area, and satisfactory handling characteristics resulting. Nonetheless, the prototype was lost on its 132nd flight as a result of tail flutter. It was calculated that the maximum attainable Mach number of the fighter was 1.19, but no details of performance are available.

Mikoyan/Gurevich I-360

  Take-off weight6820 kg15036 lb
  Wingspan9.04 m30 ft 8 in
  Length13.90 m46 ft 7 in
  Height3.95 m13 ft 12 in

Mikoyan/Gurevich I-360A three-view drawing (1657 x 1090)

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