[math-fun] Re: cricket ball seam

Since my hobby is juggling, I try to collect three of any sort of balls, including cricket balls. Even the cast cricket balls have an elaborate equator seam, and yes, the aerodynamics of the seam are important. See the seminal paper below for details of theory and experiments on transverse aerodynamic forces, including wind tunnel photographs: Noel G. Barton "On the swing of a cricket ball in flight" Proc. R. Soc. Lond. A 379, 109-131 (1982)