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Autore: Alessandro
48004 Caudron CR.714 C-1

48004 Caudron CR.714 C-1

The C.710 were a series of light fighter aircraft developed by Caudron-Renault for the French Air Force just prior to the start of World War II. One version, the C.714, saw limited production, and were assigned to Polish pilots flying in France after the fall of Poland in 1939. A small number was also supplied to Finland.

Design and development

The original specification that led to the C.710 series was offered in 1936 in order to quickly raise the number of modern aircraft in French service, by supplying a “light fighter” of wooden construction that could be built rapidly in large numbers without upsetting the production of existing types. The contract resulted in three designs, the Arsenal VG-30, the Bloch MB.700,[1] and the C.710. Prototypes of all three were ordered.

The original C.710 model was an angular design developed from an earlier series of air racers. One common feature of the Caudron line was an extremely long nose which set the cockpit far back on the fuselage. The nose housed the 336 kW (450 hp) Renault 12R-01, a supercharged inverted and air-cooled V-12 engine that resulted from putting together two 6Q engines.[2] The aircraft was a monoplane of all-wooden construction. It had a fixed and spatted landing gear, and the vertical stabilizer was a seemingly World War I-era semicircle instead of a more common trapezoidal or triangular design.Armament consisted of a 20 mm Hispano-Suiza HS.9 cannon under each wing in a small pod, with 60 rounds per gun.

The C.710 prototype first flew on 18 July 1936. The C.710 demonstrated a speed of 455 km/h (283 mph; 246 kn) at 4,000 m (13,000 ft),[6][5] but the Morane-Saulnier M.S.405 was finally selected instead, mainly due to its superior rate of climb. The prototype C.710 was destroyed in a crash on 1 February 1938.

The C.711 was a proposed racing aircraft which was not built and the C.712 was a version intended to break the World Air Speed Record.It used the fuselage of the C.710 with the wing of the Caudron C.580, while its Renault 613 engine, although basically the same as that of the C.710, had its power increased to 750 hp (560 kW) by increasing compression, allowing the use of 100 Octane fuel.[8] The C.712 made its first flight on 24 December 1936, but was destroyed in a crash at Istres on 29 April 1937 during a record attempt. The C.713, which flew on 15 December 1937, was a modified fighter which introduced retractable landing gear and a more conventional triangular vertical stabilizer.

The final evolution of the 710 series was the C.714 Cyclone, a variation on the C.713 which first flew in April 1938 as the C.714.01 prototype. The primary changes were a new wing airfoil section, a strengthened fuselage, and, instead of two cannons, four 7.5 mm MAC 1934 machine guns in the wing fairings. It was powered by the newer 12R-03 version of the engine, which introduced a new carburettor that could operate in negative g.