[math-fun] Speaking of spirals

(Which I was if you got my rhumb addendum to the sin 1/x discussion) https://www.youtube.com/watch?v=LH8G7atCFSQ https://www.youtube.com/watch?annotation_id=annotation_2287679251&feature=iv... Neglecting gravity (not by laying the thing flat!), shouldn't it be possible to eliminate the Archimedean spiral stator by replacing the straight rotor with a very particular curve a la a jai alai basket? Reproducibility might be a problem. --rwg (sin(1/x): What about spiralling into a black hole?)