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03 Aug 2021
TL;DR: In this paper, the authors proposed a wing shape that approximates the front seen parabola ideal wing by streight lines: line 1 touches parabolas at the axis origin and is 25 % of the length of the wing, line 2 is tangent of parablas at the wingtip and cuts the hotizontal line at 50 % of "a", and line 3 is tangant to parabla, cuts horizontal line at 25 % "a" and cuts line 2 at 75 % of ''a'' and 50 % ''h''.
Abstract: The new W wing shape (half wing, with “a”half wingspan and “h” wingtip height) approximates the front seen parabola ideal wing by streight lines: line 1 touches parabola at the axis origin and is 25 % of “a”, line 2 is tangent of parabola at the wingtip and cuts the hotizontal line at 50 % of “a”, and line 3 is tangent to parabola, cuts horizontal line at 25 % of “a” and cuts line 2 at 75 % of “a” and 50 % of “h”. Real W wing approximated very close the ideal parabolic wing. The new W wing gives more lateral and directional stability.