Blériot-SPAD S.510

The Blériot-SPAD S.510 was a French single-seat, single-engined biplane fighter aircraft. It first flew on 6 January 1933, and 60 were built for the Armée de l'Air, entering service in 1936. André Herbemont designed it to meet a 1930 French requirement for a single-seat fighter, basing it on his earlier S.91, and of the 11 designs submitted it was the only biplane. It was of all-metal construction with fabric-covered wings and tail, a monocoque rear fuselage and a fixed conventional undercarriage with a reputation for fragility, and it was powered by a 510 kW Hispano-Suiza 12Xbrs liquid-cooled V12 engine. It was the last French biplane fighter to enter production and stayed in service as a fighter-trainer at the start of the Second World War.