dutchking
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This is basically the improved I-16 with the upper wings added on.



DownloadWiki said:The Polikarpov I-15 (Russian: И-15) was a Soviet biplane fighter aircraft of the 1930's. Nicknamed Chaika (Russian: И-15 Чайка, "Seagull") because of its gulled upper wings,[1][2] 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.