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Bleriot-SPAD 91-7

Bleriot-SPAD 91-8

Bleriot-SPAD 91-9

 

bleriot-spad91-7

 

Despite the Type 91 Jockey being abandoned, Andre Herbemont persisted with the development of the Type 91 series fighters and, in October 1930, designed a new version. This, while retaining a fuselage similar to that of the Type 91-4, employed an entirely new wing arrangement of inverted sesquiplane configuration. Ailerons were fitted to the lower wing only, this having a span of 8.65m compared with the 7.00m of the upper wing. Designated Bleriot SPAD 91-7 and powered by a 500hp Hispano-Suiza 12Mc 12-cylinder Vee water-cooled engine, the new model was flown for the first time on 23 December 1931. On 2 June 1932, it established a 500km closed-circuit record of 308.78km/h. It was subsequently fitted with a supercharged Hispano- Suiza 12Xbrs engine as the Type 91-8, a variable-pitch Ratier propeller being adopted and a max speed of 360 km/h being reportedly achieved.


The prototype was first flown in its Type 91-8 form on 20 August 1932. In December 1932 it was leased to Hispano-Suiza as a test-bed for the company's engine-mounted 20mm cannon, which was fitted, together with a large-diameter Levasseur fixed-pitch propeller, the designation then being changed to Type 91-9.

91-7
Engine: 500hp Hispano-Suiza 12Mc 12-cylinder Vee
Take-off weight: 1458 kg / 3214 lb
Empty weight: 1093 kg / 2410 lb
Wingspan: 8.65 m / 28 ft 5 in
Length: 6.30 m / 21 ft 8 in
Height: 2.87 m / 9 ft 5 in
Wing area: 17.80 sq.m / 191.60 sq ft
Max. speed: 295 km/h / 183 mph

91-8
Engine: Hispano- Suiza 12Xbrs
Prop: variable-pitch Ratier
Wingspan: 8.65 m / 28 ft 5 in
Height: 2.87 m / 9 ft 5 in
Wing area: 17.80 sq.m / 191.60 sq ft

91-9
Engine: Hispano- Suiza 12Xbrs
Prop: Levasseur fixed-pitch
Wingspan: 8.65 m / 28 ft 5 in
Height: 2.87 m / 9 ft 5 in
Wing area: 17.80 sq.m / 191.60 sq ft

 

bleriot-spad91-7ld

 

 


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