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Piston seal off pneumatic 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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Are you excited to see a video of destruction?

Poll ended at Sun Jul 31, 2011 8:25 pm

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Total votes : 2
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Piston seal off pneumatic cannon!

Unread postAuthor: diyballistics » Tue Jul 26, 2011 8:25 pm

So in our free time my mom's boyfriend and I built this cannon. We did a lot of research to find the best way to fire the air out of the cannon, so that we could get the best results. And we found a lot of cannons that used the modified sprinkler valve and some others used the piston seal off method. And we chose to use the piston for it just because we had some of the parts all ready to do that instead of buying a sprinkler valve. Just to let you guys know this was our first cannon, right now we are on our way to making the 2.0 version which will include the piston seal off and the sprinkler valve to trigger the piston. But I just decided to upload some pics of our first one. The pain was just me seeing how the black would look.
(IF YOU JUST WANT TO SEE THE GUN SCROLL DOWN)
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Attachments
Cannon.jpg
Full view of the cannon
valve.jpg
The schrader valve....
ballvalve.jpg
The ball valve that we open to trigger the piston to release.
Accidentalhole.jpg
Today I was shooting at my usual target which is fence stakes, but I had a loose grip on the gun and then when I shot it, the gun went up from the kick and shot a tomato through my garage......
Last edited by diyballistics on Wed Jul 27, 2011 11:05 am, edited 3 times in total.
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Unread postAuthor: jrrdw » Tue Jul 26, 2011 8:28 pm

Where's the video?
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Unread postAuthor: Doctore » Tue Jul 26, 2011 8:28 pm

Looks nice.
Can we see the entire gun???
Any damage pics???
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Unread postAuthor: Gun Freak » Tue Jul 26, 2011 8:31 pm

Let's see the whole thing!
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Unread postAuthor: diyballistics » Tue Jul 26, 2011 8:34 pm

Yeah I'm sorry guys I'm just getting used to this site so I'm not to good with It. And I just recently shot a hole through my garage with it so I'll get some more pics and sorry again for my lack of skill.......... :cry:
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Unread postAuthor: warhead052 » Tue Jul 26, 2011 8:35 pm

That first picture looks like you have some skill. I think the rest of the pictures will say so as well. This is your first pneumatic correct?
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Unread postAuthor: diyballistics » Tue Jul 26, 2011 8:41 pm

Yes it is and I'm 13 and thanks for comments and I built it with my mom's boyfriend like I said in the description.
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Unread postAuthor: Mr.Tallahassee » Tue Jul 26, 2011 9:25 pm

I must say, beautiful job with this cannon. An EXCELLENT first cannon. What did you use as a piston and what is the bumper?
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Unread postAuthor: mattyzip77 » Tue Jul 26, 2011 9:33 pm

From the hole in your garage, looks pretty powerful. however we need to see the whole thing, barrel size, chamber size, piston size and what its made of, how many p s i you shoot it at, and oh yea, whats its name??? 8)
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Unread postAuthor: diyballistics » Tue Jul 26, 2011 9:37 pm

Ok well the psi I use is about 90... And I'm not sure about all those stats mattyzip77 sorry. And for the piston its a plastic piece with 2 O-rings to seal it and the bumper is just leftover rubber tubing. :D
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Unread postAuthor: Gun Freak » Tue Jul 26, 2011 9:37 pm

Chamber seal piston valve? Nice 8)
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Unread postAuthor: diyballistics » Tue Jul 26, 2011 9:38 pm

Thank you so much Gun Freak :wav:
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Re: Piston seal off pneumatic cannon!

Unread postAuthor: jackssmirkingrevenge » Tue Jul 26, 2011 11:10 pm

diyballistics wrote:The pain was just me seeing how the black would look.


An emo launcher, brilliant :D

But seriously, extremely good job for a first effort, and nice to see you've managed to find decent help.

You've also learned a valuable lesson in handling any projectile launcher - ALWAYS check your backstop and NEVER point your launcher at anything you don't intend to destroy. Don't worry though, garage doors can be fixed and this sort of thing happens to the best of us ;)
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Unread postAuthor: diyballistics » Tue Jul 26, 2011 11:12 pm

Hey I'll be making another one so I'll be sure to post a video for our new cannon!
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