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Low-pressure 3-liter bottle cannon.

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Low-pressure 3-liter bottle cannon.

Unread postAuthor: Kris.Is.Awesome » Tue Jul 25, 2006 8:33 pm

Hey everyone. I got to messing around today. I found a 1/2" brass ball valve around here today, and wondered how I could use it to make something fly across my yard. I found a 3-liter bottle, and a piece of aluminum tubing, just big enough for a paintball. i cut open a bike tube, and stole the schrader valve.

I mounted the valve in the ass of the bottle, and then I epoxied the valve inside the opening at the top. From there I forcefully shoved the aluminum tubing in. It holds 25 psi no problem. As soon as I hit 30 psi, the epoxy around the schrader valve breaks loose, so I pile some more on. It's pretty ghetto, but it works. It shoots paintballs about 50 feet.

Work area...
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Schrader...
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Ball Valve...
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Fitting on airbrush compressor...
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IT...
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Unread postAuthor: Atlantis » Tue Jul 25, 2006 10:10 pm

" in the ass of the bottle" & "From there I forcefully shoved the aluminum tubing in"

Sounds like you're your shoving something into the ass of the bottle.

Anyways...what part of the epoxy breaks? Where the bottle is ocnnected or where the schrader is?
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Unread postAuthor: Kris.Is.Awesome » Tue Jul 25, 2006 10:36 pm

Atlantis wrote:" in the ass of the bottle" & "From there I forcefully shoved the aluminum tubing in"

Sounds like you're your shoving something into the ass of the bottle.

Anyways...what part of the epoxy breaks? Where the bottle is ocnnected or where the schrader is?



Haha- yeah I kinda noticed it. Air is breaking the seam where the schrader is. But it's lifting the epoxy off of the bottle, not the schrader.
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Unread postAuthor: Atlantis » Tue Jul 25, 2006 11:49 pm

So the bottle is expanding and the solid epoxy breaks. Try something more flexible like hot glue. If you can find a way to put epoxy on the inside that should hold.
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Unread postAuthor: Kris.Is.Awesome » Tue Jul 25, 2006 11:57 pm

I tried hot glue. Doesn't hold too well. I wil lrebuild it tomorrow.
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Unread postAuthor: PVC Arsenal 17 » Wed Jul 26, 2006 9:34 am

Just use PVC, soda bottles are dangerous.
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Unread postAuthor: Kris.Is.Awesome » Wed Jul 26, 2006 10:43 am

PVC Arsenal 17 wrote:Just use PVC, soda bottles are dangerous.




It's what was laying around.
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Unread postAuthor: spudnbloonjoe » Sun Jul 30, 2006 1:46 pm

hey i just saw your post and it reminded me of a pop bottle gun i built last year, it could shoot a homemade dart almost an inch and a half into solid wood, at 25psi it was cheap and easy to make, and the design was expandable, if u want the plans just message me bak
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Unread postAuthor: sam_516 » Sun Aug 13, 2006 7:52 pm

umm...i would have to disagree with PVC Arsenal 17
soda bottlesare not dangerous if you use them under 110psi
i have been useingthem for all but 1 of my guns, i love the soda bottle chambers they are cheap and they ARE RELIABLE.
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Unread postAuthor: Kris.Is.Awesome » Mon Aug 14, 2006 11:32 am

sam_516 wrote:umm...i would have to disagree with PVC Arsenal 17
soda bottlesare not dangerous if you use them under 110psi
i have been useingthem for all but 1 of my guns, i love the soda bottle chambers they are cheap and they ARE RELIABLE.



Yeah, but it's hard as hell to keep them from leaking when you install schraders... :\
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Unread postAuthor: Z0Z0 » Mon Aug 14, 2006 12:31 pm

you might be able to put the shrader into the bottom of the bottle, because the bottom has a thicker piece of plastic. but I really dont know what i am talking about.

And to the person that said that bottles are dangerous I use to fill them up to 150 PSI and shoot them with a BB gun, but I filled one up to 175 PSI and shut off the compressor and the bottle exploded and blew the nozzle (?) off the hose :( and I havent been able to fix it, but what Im saying is its safe under 140.

EDIT : When I did it I always put the shrader valve in the cap, but you really cant do that.
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Unread postAuthor: frankrede » Sat Sep 09, 2006 10:19 pm

ZOZO d00de I do the same thing! I its hella tight.
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Unread postAuthor: zeigs spud » Wed Sep 20, 2006 7:37 pm

kinda mesy but hey it works.
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Unread postAuthor: ProfessorAmadeus » Wed Sep 20, 2006 8:33 pm

I tried the pumping up the bottle thing and it didnt work. This is a very ghetto gun and probably better than all of mine... :roll:
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Unread postAuthor: PneuJose » Tue Jan 16, 2007 5:07 pm

well yes soda bottles are very reliable, i could shoot a pvc dart to 500feet away at 50psi
anyways u can use the schrader making a hole on pvc instead of bottle
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