Thanks for the clarification guys . Back to work I guess! Thanks again

I have a tennis ball cannon with a 1 1/2" sprinkler valve with a compressor filling the air chamber constantly. I'm using a air trigger to activate the sprinkler valve. Question: is there a way to make the air flow stop after the trigger is pulled. I want a single shot so the compressor can re fill ...

A few days of reading on here and I'm not sure if things are getting easier or if I'm getting more confused. After some more measuring I have determined I don't need the tennis balls to go more than fifty feet. If they can hit a target fifty feet away with enough force to say knock over a two liter ...

I am new to this and after looking around on here and all the great information I'm beginning to see how much engineering goes into all these thing. What I'm trying to design is a "shooting gallery" with fixed mount tennis ball cannons. I'm wanting four or five semi auto cannons that can fire ten ro...