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Marble 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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Marble Cannon

Unread postAuthor: OwThatsMyEye » Wed Jun 28, 2006 7:24 pm

Here are some pics of my most recent cannon. It is a piston cannon that fires 14mm marbles. It is acually very powerful for its size and can shred coffee cans and 1/2 plywood. I am using a 150psi pop off valve as a trigger. In order to prevent acadental firing i put a stronger spring in the pop off valve. The highest preshure i use in this cannon is 125psi
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Last edited by OwThatsMyEye on Wed Jun 28, 2006 7:58 pm, edited 1 time in total.

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Unread postAuthor: cannon freak » Wed Jun 28, 2006 7:30 pm

looks pretty powerfull, I would think though that the marbels would shatter upon inpact with a really hard surface. Can you load it up with some ball berings as well, they would be nice and really strong.

Nice Gun.
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Unread postAuthor: saladtossser » Wed Jun 28, 2006 7:33 pm

i JUST realized it was a coaxial lol, pretty cool

300 psi is not a good idea
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Unread postAuthor: OwThatsMyEye » Wed Jun 28, 2006 7:37 pm

The way i have the trigger set up the cannon would go off by itself if it reached 150psi thats why i put a stronger sprig in pop off valve. I have never put more that 125psi into it.
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Unread postAuthor: OwThatsMyEye » Wed Jun 28, 2006 8:03 pm

cannon freak wrote:looks pretty powerfull, I would think though that the marbels would shatter upon inpact with a really hard surface. Can you load it up with some ball berings as well, they would be nice and really strong.

Nice Gun.

yes the marbles do chip if i shoot anything hard with it. i dont know where to get 1/2' ball berings otherwise i would.
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Unread postAuthor: noname » Wed Jun 28, 2006 8:38 pm

Nice schrader valve cover. :D And it looks pretty good, but your not done til you paint it. Never seen a stock like that on a coaxial.
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Unread postAuthor: Atlantis » Wed Jun 28, 2006 8:43 pm

Does it fire in full-auto when you continuously fill it up?

Nice gun, have'nt seen too many PVC marble cannons, a lot of ugly copper ones though.
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Unread postAuthor: noname » Wed Jun 28, 2006 9:53 pm

It wouldn't fire full auto because the air would just come out the sprinkler. Itwouldn't even go semi without a loading system.
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Unread postAuthor: pneumaticman » Wed Jun 28, 2006 10:01 pm

i see there is a sprinkler vlave on there. how much better are those than ball valves? is there a better valve i could get cheaper that a sprinkler ?
and i saw the dice thing on there what is that for?
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Unread postAuthor: PVC Arsenal 17 » Wed Jun 28, 2006 10:19 pm

Nice removable barrel setup... same as on my guns. Marbles must must be sick firing from that.
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Unread postAuthor: OwThatsMyEye » Thu Jun 29, 2006 1:31 pm

pneumaticman wrote:i see there is a sprinkler vlave on there. how much better are those than ball valves? is there a better valve i could get cheaper that a sprinkler ?
and i saw the dice thing on there what is that for?

I think it really depends on what your using the valve for. they work great for the exost on piston cannons but if you hve a fast way of opening it ball valves have a higher power potenchal. and that dice is just a cool schrader valve cap.
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Unread postAuthor: )DEMON( » Thu Jun 29, 2006 1:39 pm

If you put a elbow on the sprinkler valve and some pvc then you could use it as a handle but then don't put a cap on the end or the sprinkler valve wouldn't work.
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Unread postAuthor: PVC Arsenal 17 » Sun Jul 02, 2006 6:51 pm

I'm wondering why you didn't put the sprinkler valve before the stock so you don't have to vent all that air. That way the stock is unpressurized and even safer to use. All that air inside it now is not contributing to the gun's power.
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Unread postAuthor: huse_spud » Sun Jul 02, 2006 8:37 pm

Sounds like a pretty cool gun, but im not very fond of those stocks people use.

I'm yet to make a gun thats really unique, but i only build if i have good reason to (i made my last so that i can now TP people's house's without trespassing).

For me its gonna take time, thought and problem solving to come out with something truly special but i admit i am only a learner.

the look on this gun is sleek & deadly but when you look closer, the setup could be better.
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Unread postAuthor: ProfessorAmadeus » Sun Jul 02, 2006 9:17 pm

in your pic it looks like your wearing lipstick :D . Sorry. Well nice cannon and i love stock guns. Huse how could you set it up better?
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