 In mock dogfights, it could successfully fight not only the slower Fiat CR 42 biplane, but even the more modern Macchi C 200 and the German Messerschmitt Bf 109E fighters.However, an unfavourable technical report of the prototype was also produced by the Directorate of Aeronautical Construction of the Air Ministry.Amongst its findings, it judged the placing of the integral fuel tanks within the wings to be highly vulnerable and prone to leaks, as well as posing some difficulty to manufacture.