JudoP wrote on Aug 16
th, 2017 at 5:38am:
The challenge is getting the physics right, or getting a good model approximating the reality as close as possible.
Maybe a larger number of "drawings" (sorted like 12 steps or 24 frames in a flipbook) could answer the question for origin of the secret "factor" (or "top speed"). I mean the mystik turn, lever or moment(um) has to be hidden somewhere in the watchable turn, and what is hidden, that also has to be "trekable into daylight".
I think I will try this to draw anewed in the months of winter: Each step / frame must show a pair (or couple) of propotional "true" vectors (of force) and than show, where or how they get changed while forming (more and more) the ellipse.
It's a shame, to sling stones with the sling for a lot of decades - respectivley millenia - but not to know how and why it works. It seems the "slingshotter" knows her physiks better.