Polikarpov Fighters

The Polikarpov I-15 was a Soviet biplane fighter aircraft of the 1930’s. Nicknamed Chaika (“Seagull“) because of its gulled upper wings, it was operated in large numbers by the Soviet Air Force, and together with the Polikarpov I-16 monoplane, was one of the standard fighters of the Spanish Republicans during the Spanish Civil War. The Polikarpov I-16 was a Soviet fighter aircraft of revolutionary design; it was the world’s first cantilever-winged monoplane fighter with retractable landing gear. The I-16