..Henri MIGNET and the Pou-du-CielACCIDENTSAN EXPERIMENT ON THE GROUNDThe formula Mignet has been tested by its designer to the Birch wood, and during its tours in France and England. No official body had, in 1935, tested the device.ACCIDENTSImprovements had already been proposed during the States-General of the new Aviation, because the design of the camera showed some weaknesses: deformation of the front wing because of the control cable and the inadequacy of the secondary spar, inadequacy of the system of reminder of the command from the front wing by sandow. Much more serious, August 19, 1935, an HM-14 was nose-down and crashed, resulting in its pilot Mr. MAKKAWI died on 14 September, a second accident cost the life to Henri CHAPALET, a dozen other fatal accidents followed in France and abroad. In a few weeks, friendly mode of the Pou – of – heaven turned into a nightmare. Builders abandoned their projects. Mignet first attributed these accidents to a defect in the sandows reminder of the command of the wing and then increased the deflection of the wing. His friend Randolph (Pou-du-Ciel n ° 2) was killed trying to this amendment. MIGNET, this coup, added to previous accidents, was terrible. The small aircraft for safety proved a death trap.MIGNET itself ensured that the stability of the Pou – of – heaven compared to that of a bicycle and attached little importance to the centering.In fact, HM-14, as all aircraft, undergoes the laws of aerodynamics. There are still people to pretend that the Pou – le – sky exception to these laws and that in his presence the fluid air behaves differently than for another device.THE POU-DU-CIEL IN WIND TUNNELIn agreement with the CEOs, HM-14 No. 10 built by LAMBERT Frères rose in the wind tunnel of Chalais-Meudon in July 1936. Different configurations are tried, hut high or low. The device turns out to be unstable at the previously recommended CG. It is however determined that increased travel can be used out of the dive in which could engage the device. The report concluded that a front centering could avoid the risk of commitment in spades.Many manufacturers focused their Pou back and had excellent performance on take-off. On the other hand, this centering generated a dangerous instability.Taking into account the conclusions of the report of the blower and its own observations, Henri MIGNET undertook the preparation of a second edition of the SPORT DE LAIR describing a significantly modified device. Even today, the Pou – of – heaven built according to this second edition fly without a problem, as the opposite seen illustrated device to Marennes in 1993.VARIATIONS ON A THEME SUMMARY
Posted on: Wed, 29 Jan 2014 06:50:26 +0000
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