Hexagon wheel.[br]Variant of Chebyshev Linkage Wheel2.[br]Resized version sample.

[b]■ There exists the heel problem.[br][/b]heel/ toe digs the ground, so, please put on (= wear) the sandals.[br][br] ex Japanese [url=https://en.wikipedia.org/wiki/Geta_(footwear)][b]GETA[/b][/url] (wikipedia). or [url=https://ja.wikipedia.org/wiki/%E4%B8%8B%E9%A7%84]Enjoy picture[/url] (wikipedia in Japanese site).[br]────　⇒　 ┬──┬[br][br][b]■ Why bar ratio estimation failure?[/b][br]Value h is not fixed. WHY?[br]WHY ④⑤⑥ exists ? ----- In figure, bullet Z● (color cyan) not just on the bullet C ● (color light blue) [br]in except "a = 1" case. ------- this is bad!!! (if a=1, ④=⑤=⑥　h=√3 )[br][br]My equations are invalid? where is wrong (logic miss?) ?[br][br][b]■ Comparison of Number of edges.[br][/b]4 edge: axis height =4, 360°distance=4*4; ratio 4[br]6 edge: axis height =√3, 360°distance=2*6; ratio 12/√3=4√3=6.928[br] (√3 is the length of 2, 2, 2 length equilateral triangle.)[br]circle: axis height =r, 360°distance=2πr; ratio 2π=6.28[br][br]Please explain. 6.928 > 2π　　 ----- why?, efficient ? true?