I knew it was going to be a good distance. That's why I said a VERY LARGE compass.
Rough figures, I get about 6ft even from the top of the wrap to the center of our imaginary circle.
7Ft from the center of the circle to the bottom of the wrap. That's closer to 3.5M.
Anyway, I don't expect people to actually layout their wraps using that method (string & pencil/compass).
Our contemporary template is close enough and like I said, you could make a template from those calculations.
That's part of the beauty of the math, you don't have to actually lay it out, you figure it out.
One of the reasons that I even make a post like I did is that it might cause someone to think.
Once they've started thinking, they may start understanding. Usually, a whole new set of questions follows.
My favorite pastime is thinking.
KJ