01/31/2013. To meet the requirements of the French 1930 fighter program, André Herbemont evolved the Blériot-SPAD S.510, and it was ordered as a single prototype to participate in the program. Of all-metal construction with a duralumin monocoque rear fuselage, and fabric covered wings and tail assembly, it was powered by an Hispano-Suiza 12Xbrs twelve-cylinder liquid-cooled V-engine rated at 690 hp at 13,120 ft (4,000 m); it was flown for the first time on January 6, 1933.

After protracted evaluation, during which the center fuselage was lengthened by 1 ft 3.75 in (40 cm) to rectify a shortcoming in longitudinal stability and the vertical tail surfaces were enlarged to improve yaw characteristics, the type was ordered into production in August 1935. The first of sixty production examples were delivered early in the following year, the final two aircraft being accepted with the 12Xcrs engine and a 0.787 in (20 mm) Hispano-Suiza motor cannon. The standard armament comprised four wing-mounted MAC 1934 0.295 in (7.5 mm) guns. The Type 510 proved to be the last fighter biplane to be ordered for the Armée de l'Air.

Span: 29 ft 0 in (8.84 m)
Length: 24 ft 5.75 in (7.46 m)
Height: 12 ft 2.5 in (3.72 m)
Wing area: 236.81 sq.ft (22.0 sq.m)
Empty weight: 2,756 lb (1,250 kg)
Loaded weight: 3,638 lb (1,650 kg)
Max take off weight: 4,034 lb (1,830 kg)
Max speed at 3,280 ft (1,000 m); 201 mph (324 kmh)
Max speed at 16,405 ft (5,000 m: 230 mph (370 kmh)
Climb: to 9,843 ft (3,000 m) 3 min 37 sec
Range: 543 mls (875 km)