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Heavy Barrel

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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Heavy Barrel

Unread postAuthor: PCGUY » Sat Feb 05, 2005 1:33 pm

<div align="center">HEAVY BARREL

Provided By FoxxLord - <a href="http://www.geocities.com/cain333_2000/">http://www.geocities.com/cain333_2000/</a></div>
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Last picture I promise! This is just a better view of the back end. You can see I ran my wires through some adhesive backed wire clips just to keep them out of the way.

That's it. I dry fired it at 100psi and I almost wet myself (can you tell this is my first piston cannon?) It's very loud but I can't wait to blast some golf balls with it, I'll probably never find them! I'll keep you posted though.
hev6.jpg (14.34 KiB) Viewed 3952 times
Just a picture of where I put the pressure gauge. It's easy to read right there on the wye.
hev4.jpg (16.12 KiB) Viewed 3952 times
Back end of the gun. Yeah my newly blue sprinkler valve, you got a problem with blue?! The decals make it look real pretty. The strap ends at the hose clamp, that's the air hose that goes all the way to the back of the cannon.
hev3.jpg (15.63 KiB) Viewed 3952 times
Not much new here you haven't seen already, the shoulder strap I added to give my poor arms a rest from holding this beast.
hev2.jpg (14.49 KiB) Viewed 3952 times
Kind of a crappy picture I know, but it gives you a good idea of the layout.
hev1.jpg (14.11 KiB) Viewed 3952 times
Last but not least here's a good look at the sleeved barrel. Heavy Barrel isn't just a name, it's also a description! The barrel is 5' sleeved so it's a tad on the heavy side. The dot on the seam is a metal pin I drove into it to shim the sleeve apart, my sleeve cut wasn't the best so I had a spot where the balls would stop. The shim worked great but I didn't use hardened steel (it's a wire shirt hanger) so I could only hammer it down about 8&quot;. I was really hoping to shim all 5' (it fills the gap as well as widens the ID).

I didn't snap any pictures of the piston but it's construction is pretty basic. In fact, it's just a short Pringles can! I Bondo'ed the inner walls to make it super strong and wrapped the outside in cloth tape (hockey stick tape?) Glued some neoprene rubber to the metal part of the can and it fires great.

Well that's it for now. The gun was tested and leak checked at 50psi using the Schrader valve, it works great so far but I'll definitely keep updating as I add the finishing details.
I finally got my Co2 fill today and put the gun together. Here's the new pics:
HB7.jpg (10.88 KiB) Viewed 3952 times
This is the heart of Heavy Barrel. 9.6V 1000mA is enough power to run the electronics and still fire the solenoid, plus it came with a recharger so I can just charge it back up when it runs low. The pink things are just wire connectors, I have them in several locations so it can all be disassembled without hassle.
HB6.jpg (12.87 KiB) Viewed 3952 times
Close up of the control box. Missile switch in the armed position and the ready light is on. The other LED is the &quot;fire&quot; light that comes on when the trigger is pushed. That all leads down to the push button trigger on the handle. The other two wires run back to the solenoid.
HB4.jpg (9.52 KiB) Viewed 3952 times
A better look at the regulator and shut off valves.
HB5.jpg (10.94 KiB) Viewed 3952 times
The other side of the cannon. The Co2 tank has it's own on/off valve but I also wanted a ball valve for piece of mind. The black control box was a real pain in the ass to make. I bent some sheet aluminum into the box but then needed a way to mount it. In the end I used a little bondo to basically &quot;sculpt&quot; a base plate and then JB Welded it all to the Wye. It worked out really well. Super clean.
HB3.jpg (13.17 KiB) Viewed 3952 times
Here's a close-up of the &quot;bread n' butter&quot; of Heavy Barrel. At the top you can see the 12oz Co2 bottle with 115psi constant regulator. 1/8&quot; thick aluminum steps were JB welded to the 3&quot; Wye and then reinforced with two large hose clamps. The whole idea was mounting all the accessories without drilling into the PVC. It's very solid.

That's a 9.6v 1000mA batter pack that powers the solenoid and firing controls. Had to fabricate the bracket to hold it on, luckily aluminum bends pretty easily when coaxed with a hammer!
HB2.jpg (13.48 KiB) Viewed 3952 times
Here's my latest project nearing completion. 8'2&quot; semi-coaxial, Co2 fueled, piston powered, 1&quot; sprinkler exhaust, yadda yadda yadda!

It's not quite complete, I'm waiting on a Co2 fill-up (not easy in po-dunk Michigan). Then I'll just need to attach the bottle to the back of the gun.
HB1.jpg (12.08 KiB) Viewed 3952 times
Last edited by PCGUY on Fri May 12, 2006 9:46 am, edited 1 time in total.
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Unread postAuthor: tatorassassinator » Sun May 01, 2005 4:59 pm

WOW! very nice! I love the design for the name. The sleeving is very nice and the coat hanger part is very genious! Have you shot it yet? If so you should post pics and vids.
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Unread postAuthor: Devilsmed98 » Thu Sep 08, 2005 5:42 am

Wow nice how long did it take you to build it and how much money? very imppressed. Have you recoreded a max distance.
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Unread postAuthor: Agent Orange » Sun Sep 11, 2005 4:32 pm

beautiful work! im currently working on a similar (sort of) cannon, mine uses a 4" piston and the barrel is flush with the end of the chamber...i'm having problems with the valve, though, what do you use to lubricate the valve?
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Unread postAuthor: saladtossser » Sun Sep 11, 2005 5:53 pm

what kind of a co2 regulator is that?
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Unread postAuthor: bubblebathman » Mon Sep 26, 2005 12:42 pm

sweet gun how much does it cost
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Unread postAuthor: THEMOST » Fri Nov 03, 2006 10:33 pm

so the pvc is ok with the co2 ehh?no prmature deaths?

I've been trying to figure out a way to rig up co2 with pvc. and i think iv got it too. and it looks like it can be done
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