Ball Shooter Hood Curvature

Hello all,

I am currently prototyping ball shooter designs, and I would like to know what approximate curvature (radius) teams have used in their prototypes.

This is one photo I have found for a hood pitcher design in 2009 for reference.

http://www.chiefdelphi.com/media/photos/32909

If you take your shooter wheel radius and add the diameter of the ball minus how much you want to compress the ball you will get your hood radius…