The second prototype, VB 10-02, had a bubble canopy for improved visibility and was powered by two 1,150 hp Hispano-Suiza 12Z engines. The aircraft was also armed with four 20 mm Hispano-Suiza cannons and six .50-cal Browning machine guns, all mounted in the wings. The VB 10-02 first flew on September 21, 1946. Mechanical issues and engine overheating plagued both prototypes; these challenges, combined with the availability of cheap surplus allied aircraft and the jet age on the horizon, lead to a revised order of just 50 aircraft.
