François Denhaut
| François Denhaut | |
|---|---|
 |
|
| Born |
21 December 1881Expression error: Unrecognized word "december". Champagnat, Creuse |
| Died | 1952 |
| Nationality | French |
| Occupation | Aviator, aircraft designer. |
| Known for | First practical flying boat |
François Denhaut (1877–1952) was a French aviator notable for designing, constructing and flying the first flying boat in 1912.
He was born on 4 October 1877 at Champagnat, Creuse and after some success as a racing cyclist became interested in aviation. In 1908 he constructed his first aircraft, a canard biplane powered by a 15 hp (11 kW) Anzani. engine constructed with the help of a mechanic called Bouyer a M. Mercier. It was briefly flown in August 1909, with Bouyer at the controls, In 1911 he gained his pilot's license and became the chief pilot of Pierre Levasseur's flying school.
He died at Bellegarde-en-Marche in 1952.
In 1911 Denhault conceived the idea of the flying boat, an aircraft whose fuselage formed the main float of the aircraft. Previous aircraft intended to fly from water had all used an arrangement of floats mounted below the aircraft in place of wheels. The hull was triangular in cross section, with the apex at the top. To provide hydrodynamic lift, the hull was fitted with an angled plate mounted below the nose. It was powered by a 50 hp (37 kW) Gnome Omega driving a pusher propeller mounted below the upper wing. To allow for maneuvering on the ground, an undercarriage was fitted, with two wheels attached. Denhaut took particular advantage of this aspect of the design by taking off from the ground when he made the initial tests. This project was financed by Jacques Donnet, and the craft was later named after him.
The first proper test of the craft took place on 12 March 1912. Denhaut took off and flew over the River Seine. However, when preparing to land, misjudged his approach, the nose-mounted hydroplane dug in, and the aircraft turned over; Denhaut managed to escape from the submerged cockpit, and took refuge on the bottom of the upturned hull. The craft was towed back to shore.
Denhaut, with the advice of Robert Duhamel, decided to rebuild the aircraft, making the necessary modifications to the first design model. He changed the hull to be rectangular in shape, because it had previously been very slender, and had tended to dip into the water. He also made slight modifications to the position of the undercarriage.
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