Bloch M.B.700
1940
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Bloch M.B.700

In 1936, the Ministere de l'Air established a requirement for a lightweight fighter of wooden construction which resulted in the development of the Arsenal VG 30, the Caudron C 713 and the Bloch 700. The last-mentioned type, designed by Andre Herbemont, who had been responsible for the Bleriot SPAD fighter series, was built at the former Bleriot-Aeronautique plant at Suresnes which had been incorporated in the Societe Nationale de Construction Aeronautiques du Sud-Ouest (SNCASO) on 1 January 1937, under the directorship of Marcel Bloch. Of stressed-skin construction, the Bloch 700 was powered by a Gnome-Rhone 14 M614-cylinder radial engine offering 700hp for take-off and had provision for two 20mm Hispano-Suiza 404 cannon and two 7.5mm MAC 1934 M39 machine guns. The sole prototype was destroyed at Buc after capture by German forces.

3-View 
Bloch M.B.700A three-view drawing (1648 x 1255)


Specification 
 MODELMB.700
 CREW1
 ENGINE1 x 700hp Gnome-Rhone 14M-6
 WEIGHTS
    Take-off weight1850 kg4079 lb
    Empty weight987 kg2176 lb
 DIMENSIONS
    Wingspan8.90 m29 ft 2 in
    Length7.34 m24 ft 1 in
    Height3.40 m11 ft 2 in
    Wing area12.40 m2133.47 sq ft
 PERFORMANCE
    Max. speed550 km/h342 mph
    Cruise speed440 km/h273 mph
    Ceiling8700 m28550 ft
 ARMAMENT2 x 20mm, 2 x 7.5mm

Comments
Michael Allen, 05.08.2016

It is a very interesting aircraft. But lightweight concept was a good idea. The ultimate aircraft of this cocept has to be the de Havilland Mosquito which made use of balsa wood and furniture manufacturers. It's light weight meant it was very fast and could outrun Luftwaffe fighters. The only Allied aircraft that the Germans tried to directly copy. They failed because of problems with adhesive technology.

Pablo Alvarez, 09.01.2015

Consider that not even the Italian aircraft whose average power was 840hp were able to reach 500 km/h. This says a lot about a design that has only 700hp.

toja, 28.11.2013

Yak-3 wasn't "lightweight fighter", it had early Spitfire's mass and was much heavier than Bf-109d, only 10% lighter than bf-109g.

Klaatu83, 02.01.2012

Before WW-II, the French really seem to have gone in for the development of the "lightweight fighter" concept more than other countries did. Unfortunately, none of them ever amounted to much.

Another examples of this concept was the Bell P-77, developed for the U.S. Army Air Force during the war, with also was a failure.

Perhaps the only really successful "lightweight fighter" of the period was the Soviet Union's Yak-3 which, ironically, ended up being flown by ex-patriot French pilots!

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