Need help with finding a cheap cannon to make

[myself123]

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]

define cheap. whats your price range?

[myself123]

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]

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]

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]

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


oh and :

[myself123]

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]

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

[myself123]

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

Pretty sure about that yes :p

[c11man]

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

[Willdebeers]

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]

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]

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]

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]

Do you work with imperial or metric?