William Allison

William M. Allison, of Dayton, Ohio, patented his sled kite in 1956, which proved there was no conflict with Francis Rogallo’s Flexible kite. The Allison sled is supported only in its longitudinal plane and relies on the wind to give lateral support by holding its canopy open. Allison’s patent shows an early model, also classified as a flexible kite, having three spines supporting a tapering, non-vented cover.