| Because of the Sled kite's simplicity it captured the
attention of
many kite designers. The original design by William M. Allison had a
tendency
to collapse with wind change and 'wobble' as the air flow left the
trailing
edge.
Frank Scott added a triangular vent to the lower half of the
sail and
made the kite more stable. Ed. Grauel introduced two trapezoidal vents
to the lower half of the sail which improved the kites performance.
Guy Aydlett turned his attention to the Sled's tendency to collapse
and introduced a curved leading edge instead of the straight edge of
other
designs. Air is equalized over the curved leading edge and improved
stability.
This kite is known as the Hornbeam and has no vented sail.
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