Cheers Jimmy. The tennis ball will only need to travel in a nice 40 or 50 yard arc so doesn't need to be a distance machine like I know others aim for.

I'll have a look into the t shirt launchers but I think the rotating side if those will be bit too complex for me and start adding weight where I ...

Hi all.

Am working on a little project which a have a few questions about. Hope you don't mind me asking.
So its using very much the same theory as the compressed air spud guns that you guys make, other than I want mine to have multiple barrels and somehow recharge automatically.

So the design so ...