This plane were very difficult to build, because lags, there are some Cockpit novelties (and engine overspeed) used from other I-15 and so...(AG-5: ejection, AG-6: Parachute, AG-7: 'auto pilot')
Some History: I-15 "fighter fifteenth" "light maneuverable" (nickname "Chato" Spanish-"snub") — Soviet single-engine fighter-polutoraplan, created in 1933 in the Design team ? 2 TSKB-39 under the leadership of the Soviet aircraft designer Nikolai Polikarpov. First took off in the autumn of 1933 (October). It was mass-produced since 1934. He was in service with the flight units Of the air force of the Workers 'and peasants' red Army since 1935. From 1934 to 1939 total produced: 384 planes in the USSR + 237 planes in Spain. It was used in wars and armed conflicts in Asia and Europe. Photos: engine: plane: blueprint: