I should probe add some more detail, Im planning to make the entire thing remotely activated, that means it is able to raise, lower and possibly even pivot remotely, if it works it will be pretty awesome!

thanks guys! ill try that out!

Hi everyone! Im doing a school project and what im making is a pneumatically powered spud gun (obviously). I was just wondering, roughly how much psi would I need to fire a standard tennis ball a reasonable distance? (15+ Meters or about 49 Feet)
Please help!