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Channel wing
The channel wing is an aircraft wing principle developed by Willard Ray Custer in the 1920s. The most important part of the wing consists of a half-tube with an engine placed in the middle, driving a propeller placed at the rear end of the channel formed by the half-tube.
== Development ==
In 1925, Willard Custer had himself observed how very strong winds had managed to lift the roof of a barn. Custer realized it was the high velocity of the wind that created this suction, even when the barn itself was obviously not moving. He started studies into this phenomenon, and by 1928 he had made the first models of a wing with a half-tube-formed section instead of the usual wing profile. This was patented in 1929. Development of the half-tube channel wing was then refined further, and on November 12, 1942, the CCW-1 (''Custer Channel Wing 1'') airplane was flying for the first time. Custer built additional experimental aircraft; the last one was CCW-5, of which a few were manufactured in 1964.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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