Polikarpov I-15 “Rata” (scale model 1:3). The Polikarpov I-15 (Russian: И-15) was a Soviet biplane fighter aircraft of the 1930s. During the Spanish Civil War it was called the Rata.
The first flight was made in October 1933 with Valery Chkalov at the controls, powered by an imported Wright R-1820 Cyclone engine. The I-15, also known by its development name TsKB-3, was a small biplane fighter with a gulled upper wing. The single bay wings were of wooden construction, while the fuselage was of mixed steel and duralumin construction, with a fabric covered rear fuselage.