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NOTE:12-26-98 Changes that should be made in the drawing. The 1" (red) "T" should be a 1 1/2" "T" with a 1 1/2" X 1" adapter in each end. The 1" pipe and 1" X1 1/2" Bushing Adapter should be removed and the barrel extended all the way into the "T". the 3" X 1" bushing that the barrel passes through should be a 3" X 1 1/2" bushing.

This is my idea of and improvement to the "sprinkler valve" pneumatic cannon or spud gun. It is my thinking that there is a "bottle neck" of air flow at the valve. Think about this. You build an air cannon with a 3" air chamber and a 2" or 1 1/2" barrel that is fed air THROUGH a 1" valve. Now this gun gives good performance and your happy with with it. But, if you built a pneumatic gun it is for one reason......MORE POWER !

So why not use 2 valves to double the air flow.

Now this might not give you 2 times the distance but it will surely increase your range. You see the air pressure pushing the spud is not what gives it it's speed .(well it is part of it ) but the real factor here is the VOLUME of air pressure along with the speed at which it is being delivered or moving.

I drew this gun up with the barrel inside the air chamber ,because I am kinda fond of this design. This same idea of 2 valves can easily be adapted to the "over and under" design of the barrel over the air chamber. the basic wiring of the batteries and triggers (not shown)for this gun can be found on my Wiring Diagram page. If you can't figure out how to construct this gun and wire it up,from the information found on these pages, you should not try to make it.

This gun should be safe if not pressurized to more than 100 psi. even if you are tempted to do so , do not . 100psi will give you a safety factor of 2 1/2 before the pipe will burst If the air chamber were to crack because of over-pressurization it would not stop there. The gun would literally EXPLODE into many very sharp pieces of shrapnel that will not only cut you and sink very deeply into your body it might very well kill you and anyone unlucky enough to be to close in the process.

This Air Cannon was designed by me on or around 3-1-1998.