Curve ball Flinger....Magnus Effect. // Homemade Science with Bruce Yeany

Throwing a curve ball couldn't be made any easier than this simple device. Light weight foam or hollow plastic balls are the projectiles used in an easy demonstration of the Magnus Effect. The throwing paddle can be made out of wood, cardboard tubing, or plastic. Easy to make, even easier to throw. A few variations are shown that I've been using with middle school students for years. I've also used it at workshops for science teachers who had just as much fun with them as my students.

video on the Flettner rotor. https://youtu.be/XsGin7CFaF8

video on the cup flyers.
https://youtu.be/05zF0sBwHe8