I-15 became the further development of fighter-biplane constructions of N.N. Polikarpov. The first prototype of I-15 (TsKB-3) with Wright "Cyclone" engine made his maiden flight in October 1934. This airplane had outstanding maneuverability, especially in the horizontal flight. In total 384 I-15 fighters were developed during 1934-1935. More than 200 planes had delivered to export (Spain and China), and the rest served in the Red Army Air Force to the end of 30s.
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