Low-pressure 3-liter bottle cannon.

[Kris.Is.Awesome]

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...



Schrader...



Ball Valve...



Fitting on airbrush compressor...



IT...

[Atlantis]

" 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?

[Kris.Is.Awesome]

" 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.

[Atlantis]

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.

[Kris.Is.Awesome]

I tried hot glue. Doesn't hold too well. I wil lrebuild it tomorrow.

[PVC Arsenal 17]

Just use PVC, soda bottles are dangerous.

[Kris.Is.Awesome]

Just use PVC, soda bottles are dangerous.

It's what was laying around.

[spudnbloonjoe]

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

[sam_516]

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.

[Kris.Is.Awesome]

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... :\

[Z0Z0]

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.

[frankrede]

ZOZO d00de I do the same thing! I its hella tight.

[zeigs spud]

kinda mesy but hey it works.

[ProfessorAmadeus]

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...

[PneuJose]

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