Need help with finding a cheap cannon to make

myself123 · Thu Aug 27, 2009 10:34 am

Hello there, im new to this, and me and some friends want to make a air cannon. Nothing too fancy, just something cheap. We got 100psi at school that we can use for anything so that would be our power. Any suggestions on what we could make?

geardog32 · Thu Aug 27, 2009 10:48 am

define cheap. whats your price range?

myself123 · Thu Aug 27, 2009 11:19 am

Well, it doesnt have to be a super advanced thing, just something to have fun with on school

I dont know much about this, maybe you(or someone else) can just come with some suggestions which is not too expensive. If it is any tutorials that would be great

Willdebeers · Thu Aug 27, 2009 11:20 am

Just make a ball valve pneumatic. They are cheap, easy, and provide moderate power. You could step it up to a piston valve, but that is quite advanced.

myself123 · Thu Aug 27, 2009 11:30 am

Willdebeers wrote:Just make a ball valve pneumatic. They are cheap, easy, and provide moderate power. You could step it up to a piston valve, but that is quite advanced.

Is it any tutorials for this? :p

Willdebeers · Thu Aug 27, 2009 12:07 pm

Here is one of many: http://www.instructables.com/id/AA-Cannon/

oh and :

myself123 · Thu Aug 27, 2009 12:09 pm

I tried to make a quick idea in paint for a small gun, would this work?
The nipple is for one of those small air hoses, so i can connect it at school to fill it. How big does the tank thing need to be? And what do i need to make it so it can hold 100psi?

c11man · Thu Aug 27, 2009 12:12 pm

are you sure you would not get in trouble for this? cuz most shcools dont like weapons.....

myself123 · Thu Aug 27, 2009 12:13 pm

c11man wrote:are you sure you would not get in trouble for this? cuz most shcools dont like weapons.....

Pretty sure about that yes :p

c11man · Thu Aug 27, 2009 12:14 pm

did you ask you teacher? and what do you plan on shooting at what?

Willdebeers · Thu Aug 27, 2009 12:15 pm

Ok first things first. The tank can be any size you want, but i would recommend mabye 2" pipe, 36" long. Then a 1" (or 1/2") barrel 72" long. You should make it all out of Sch. 40 (or Sch. 80) NSF-PW PVC. LOOK FOR THE STAMP THAT SAYS NSF-PW. This means it is pressure rated.

myself123 · Thu Aug 27, 2009 12:16 pm

c11man wrote:did you ask you teacher? and what do you plan on shooting at what?

We did ask him yes, and he said we were free to make it in our free time :p Im on elautomation, and were we are its just 3 classes and some woods behind.

Btw, is it possible to get an adapter from car tire valve to those small air hoses?

qwerty · Thu Aug 27, 2009 12:17 pm

Were are you from because if you are Uk i suggest making a copper ballvalve gun or if the use a pvc ballvalve gun.

myself123 · Thu Aug 27, 2009 12:18 pm

qwerty wrote:Were are you from because if you are Uk i suggest making a copper ballvalve gun or if the use a pvc ballvalve gun.

Im from norway ^^

Willdebeers · Thu Aug 27, 2009 12:19 pm

Do you work with imperial or metric?