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Aviation History
1909
1909 - 0754.PDF
NOVEMBER 27, i9°9- KOECHLIN. Monoplane, in which the two principal points of interest arc the watertight wood body and the method of warping the wings. The body is constructed like a light racing skiff, but is flat- bottomed throughout. It is also decked in except for a small cock- upper ends. The back of the pilot's seat is pivoted so that "h sways with his body, and consequently if he leans over to the left he is able to pull upon the upper wire passing to the top side of the lever on the right hand wing. At first sight it might be supposed that this would have no effect other than to put the tubular steel spar in compression, for the wire lies nearly horizontal above the Koechlia Monoplane at Paris Flight Show, KOECHLin Sketch showing the details of the tail of the Koechlin; flyer, illustrating a method of flexing the elevator. pit accommodating the pilot's seat. In order that the lines of the body shall be disturbed as little as possible, the engine has been mounted outside on a bracket which projects in front of the " bows." The wings are supported on tubular steel spars, as shown in an accompanying sketch, and near the extremities of the smaller tubes, which are adjacent to the trailing edge of the wings, two short wooden cross-pieces are hinged. These little levers are anchored to the-»chassis frame by wires passing from their lower extremities, and! also to the back of the pilot's seat by wires attached to their SEAT - SftCK Sketchshowing theattachment of theengine to the watertight hullof the Koechlinflyer. Sketch showing how the wings are warped on the Koechlin flyer. 756 wing. The spar itself, however, is initially slightly curved, and under additional stress bends still further into an arch concave to the earth. The wooden lever is merely a device for applying a force to the axis of the rod, and the lever is hinged so that the fulcrum afforded by its anchorage shall be maintained when the spar bends. The system is illustrated by an accompanying diagram, and another sketch relating to this ma- chine shows the method of flexing the tail for use as an elevator. A rudder is provided at the rear.
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