Looking at hooded shooters and how different parameters impact the exit velocity of the ball with a very crude coulomb friction model, but accounting for centripetal force acting on the ball, as well as friction, ball stiffness and size (the latter of which are the most interesting).
HoodShooter_wp.pdf (1.7 MB)
An accompanying numeric analysis (feel free to make your own copy): https://docs.google.com/spreadsheets/d/19iO3QycvD5eS5aAd8NO0aTdYCo2BxQYWy9KSG3k0pLs/edit?usp=sharing
Feedback appreciated. I did just write this in an afternoon… I’m a little surprised I hadn’t seen something like this before despite these things being done to death but if anyone knows of any other papers that would be sweet.