The Dewoitine D.500 was an all-metal, open-cockpit, fixed-undercarriage monoplane fighter aircraft, used by the French Air Force in the 1930s. Introduced in 1936, the design was soon replaced by a new generation of fighter aircraft with enclosed cockpits and retractable undercarriage, including the 510’s successor, the Dewoitine D.520.
D.510 was re-engined with Hispano-Suiza 12Ycrs producing 640 kW (860 hp), armed with a 20 mm Hispano cannon and 2 _ 7.5 mm (.295 in) MAC 1934 machine guns in the wings. Its first flight was on 14 August 1934, 120 built.