A little not very serious exercice with the Developping curve from a circle
I found the good measure of the perimeter of the circle with only control points, rule and circles :)
So I will can now construc the real curve
But all depend of the "measure" of the distance of your Control points "above" the curve:
are they proportional of something or are they pure random?
I am very anxious :D
Final curve tomorrow :)

Ps Of course I can make the same with only a numeric calculate :)