Ball throwing machine !

Hi everyone ! I want to have a ball thrower machine like the one used in Tennis . How can i make a cheap one which throws the ball really fast ? I searched in the site but only got one which uses a bike and throws very slowly . Can I have some help ?

Goodhart8 years ago
Could something like THIS be modified to throw a ball the way you want it to?
What about a pneumatic cannon? You could develop some kind of ball feed mechanism similar to a paintball gun. See if you can find a video of the one used in the TV Show "fantasy factory". That one would be insane!
lemonie8 years ago
You need a pair of big-ish electric motors and some rubber-tyre wheels I believe. If you can find these (or better still something that runs on petroleum?) let us know.