The Bloch MB.480 was a

French French (french: français(e), link=no) may refer to: * Something of, from, or related to France ** French language, which originated in France, and its various dialects and accents ** French people, a nation and ethnic group identified with Franc ...

twin-engined

torpedo-bomber A torpedo bomber is a military aircraft designed primarily to attack ships with aerial torpedoes. Torpedo bombers came into existence just before the First World War almost as soon as aircraft were built that were capable of carrying the weight ...

/reconnaissance

floatplane A floatplane is a type of seaplane with one or more slender floats mounted under the fuselage to provide buoyancy. By contrast, a flying boat uses its fuselage for buoyancy. Either type of seaplane may also have landing gear suitable for land, ...

designed just before the start of the

Second World War World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

by Société des Avions Marcel Bloch. Only two were built, the

French Navy The French Navy (french: Marine nationale, lit=National Navy), informally , is the maritime arm of the French Armed Forces and one of the five military service branches of France. It is among the largest and most powerful naval forces in t ...

deciding to use landplanes instead.

Design and development

In May 1937, the French Air Ministry placed an order with Société des Avions Marcel Bloch for two prototype floatplanes intended to fulfill a French Navy requirement for a twin-engined torpedo-bomber/reconnaissance floatplane. Bloch's design, the Bloch MB.480 was a low-winged

monoplane A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple planes. A monoplane has inherently the highest efficiency and lowest drag of any wing confi ...

that closely resembled the earlier

Bloch MB.131 The Bloch MB.130 and its derivatives were a series of French monoplane reconnaissance-bombers developed during the 1930s. They saw some limited action at the beginning of World War II but were obsolete by that time and suffered badly against th ...

reconnaissance/bomber landplane.Military Bloch aircraft:MB 480
. ''Dassault Aviation''. 2006. Retrieved 19 May 2010. It was powered by two 1,060 hp (791 kW) Gnome-Rhône 14N

radial engine The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders "radiate" outward from a central crankcase like the spokes of a wheel. It resembles a stylized star when viewed from the front, and is ca ...

s and carried a crew of five. Defensive armament was a 7.5 mm Darne machine gun in the nose and a ventral bath, while a 20 mm cannon was fitted in a powered dorsal mounting. A heavy load of bombs, torpedoes or auxiliary fuel tanks could be carried in an internal bomb bay.Green 1962, p. 10. The first prototype made its maiden flight from

Étang de Berre The Étang de Berre (in Provençal Occitan: ''estanh de Bèrra / mar de Bèrra'' according to classical orthography, ''estang de Berro / mar de Berro'' according to Mistralian orthography) is a brackish water lagoon on the Mediterranean coast of ...

in June 1939. The aircraft's

twin tail A twin tail is a specific type of vertical stabilizer arrangement found on the empennage of some aircraft. Two vertical stabilizers—often smaller on their own than a single conventional tail would be—are mounted at the outside of the aircra ...

was raised to avoid spray on take-off and landing, and the tail fins were cropped to restore a good field of fire for the dorsal cannon after the tail assembly had been raised. The second prototype flew in October 1939.Green 1962, pp. 10–11.

Operational history

Although testing was relatively successful, the French Navy had meanwhile decided that the torpedo-bomber reconnaissance role could be better met by landplanes, with the much faster Lioré et Olivier LeO 451, already on order as a medium bomber for the

French Air Force The French Air and Space Force (AAE) (french: Armée de l'air et de l'espace, ) is the air and space force of the French Armed Forces. It was the first military aviation force in history, formed in 1909 as the , a service arm of the French Army; ...

, being chosen. On 9 September 1939, Bloch was told to suspend development trials, while on 10 December it was officially announced that no orders would be placed for either the MB.480 or its two competitors, the SNCAC NC-410 and the Loire-Nieuport 10.Green 1962, p. 11. The first prototype was destroyed after colliding with a pier on Étang de Thau on 23 June 1940, while the second prototype was placed into storage in July, and was not flown again.Green 1962, pp. 11–12.

Specifications

Notes

References

*Green, William. ''War Planes of the Second World War: Volume Six, Floatplanes''. London:Macdonald, 1962.

External links