this was originally posted on spudtech here at
http://www.spudfiles.com/spudtech_archi ... hp?t=15811
![Image](http://img402.imageshack.us/img402/7703/cannon1hv9.jpg)
it has a about a 16 foot barrel at 45 degrees. it just uses a ball valve, but dont let it fool you, with the barrel as long as it is the cannon is incredibly powerful. the barrel is 1.5'' pvc and the chamber is 2'' pvc. if were to take all the pipe from the chamber and make it into one long pipe it would be about 20 feet long. so thats about a 2:1 C:B ratio ( no i didnt do the math, its just a guess), so its a big waste of power, i know.
i did build a piston valve for it and that made it even more powerful, but after about 10 shots or so the valve broke. i didnt have a bumper in the piston valve so it shattered. so its back to the ball valve with this thing. its still very fun to shoot and is a interesting conversation piece.
let me know what you think. keep in mind its aver a year old and i dont intend to change it, this is one of my "beginner spudguns". its litterally my second or third pneumatic.
ps- if you look at the original post at spudtech you will see that i originally claimed 3/4 miles with it, this is totally false. at the time i really did beleive i got it 3/4 mile, but when i accually messured it it wasnt much more than 1/4 mile.
questions or comments welcome.