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Hanriot H.220


hanrh220-1


Included among exhibits at the Salon de l'Aeronautique held in Paris in November 1936 was a striking all-metal twin-engined three-seat fighter. It had a somewhat abbreviated oval-section monocoque fuselage, a shoulder-mounted semi-cantilever wing carrying split trailing-edge flaps over its entire span and two 450hp Renault 12Roi 12-cylinder inline air-cooled engines projecting ahead of the fuselage nose. This, the H.220, had been designed to a C3 requirement prepared by the Service Technique de l'Aeronautique and issued in October 1934. Other contenders were the Breguet 690, the Potez 630, the Loire-Nieuport 20 and the Romano 110. As it became evident that the H.220 would be underpowered, the Renault engines were discarded in favour of 680hp Gnome-Rhone 14M 14-cylinder radials, and, with these installed, the first flight test was made at Avord on 21 September 1937.

hanrh220-2


The intended armament of the H.220 comprised two forward-firing 20mm cannon and two aft-firing 7.5mm MAC 1934 machine guns on a flexible mounting, but, in the event, no armament was fitted. On 17 February 1938, the prototype made a forced landing at Avord after losing the starboard propeller following a failure in the reduction gearbox. The poor stability evinced during flight testing of the H.220 (which had resulted in progressive changes in the contours and size of the vertical surfaces), coupled with inadequate internal capacity and some lack of sturdiness revealed by the forced landing (as a result of which the fuselage was irreparable), dictated major redesign, resulting in the H.220-2.


After the partial destruction of the H.220, major redesign was initiated by the Societe Nationale de Constructions Aeronautiques du Centre, or SNCA du Centre, which had absorbed the Hanriot facility at Bourges on 1 February 1937. The oval-section monocoque fuselage of the original H.220 was discarded in favour of a fuselage built as two half shells mated by a central keel. An entirely new tail assembly with twin endplate vertical surfaces was fitted and the Gnome-Rhone 14M radial engines were enclosed by low-drag nacelles. These features were mated with the wing of the original H.220 to result in the H.220-2, which was first flown (as the H.220 No 02) on 17 March 1939. Four months later, in July 1939, this prototype was to be displayed statically as the NC 600 No 01 multi-seat fighter at the Salon de l'Aeronautique. In fact, the genuine NC 600 was to differ from the H.220-2 in several major respects.

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H.220-2


H.220
Max take-off weight: 3700 kg / 8157 lb
Empty weight: 2673 kg / 5893 lb
Wingspan: 12.80 m / 41 ft 12 in
Length: 7.87 m / 25 ft 10 in
Height: 3.40 m / 11 ft 2 in
Wing area: 21.16 sq.m / 227.76 sq ft
Max. speed: 520 km/h / 323 mph
Range: 850 km / 528 miles

H.220-2
Max take-off weight: 3850 kg / 8488 lb
Empty weight: 2820 kg / 6217 lb
Wingspan: 12.80 m / 41 ft 12 in
Length: 7.87 m / 25 ft 10 in
Height: 3.40 m / 11 ft 2 in
Wing area: 21.16 sq.m / 227.76 sq ft
Max. speed: 532 km/h / 331 mph
Range: 770 km / 478 miles

 

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