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Tyler's Large paintball 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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Unread postAuthor: JDP12 » Mon Dec 03, 2007 6:37 pm

That's very cool, and who cares if its really long? its not like he needs it to be short, so why not make it long?

MrCrowley, Id suggest trying some harder paint. I find that super cheap paint from my local fleet farm works bad in paintball because it is so hard (they sometimes bounce off trees), so they should work fairly good in a gun. You're probably just using paint with a very weak shell so it bursts easily for paintball
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Unread postAuthor: MrCrowley » Mon Dec 03, 2007 6:42 pm

Yeah, when I freeze them I have no problem, but some of them stay in my garage and get reasonably soft, I just don't feel like constantly freezing them all.
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Unread postAuthor: JDP12 » Mon Dec 03, 2007 6:43 pm

that's why they're breaking, and they're probably getting soft in your garage because there is a lot of humidity maybe?

I just know that if paintballs get exposed to moisture, they start to swell and soften
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Unread postAuthor: MrCrowley » Mon Dec 03, 2007 6:46 pm

Yeah, Auckland (NZ) is about 70% humidity on an average day, and in the summer a lot worse. They become soft after like 10minutes out of the freezer.
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Unread postAuthor: JDP12 » Mon Dec 03, 2007 7:41 pm

yea that's gotta suck
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Unread postAuthor: Ragnarok » Mon Dec 03, 2007 8:54 pm

MrCrowley wrote:Hmm strange mine burst about 60% of the time over 110psi.

I've never had a paintball break in HEAL's barrel, even at 300 psi.
I may just be using really tough paint, but I've not got any real paintball experience, so I don't know.
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Unread postAuthor: MrCrowley » Mon Dec 03, 2007 9:02 pm

Same here, seem's to be Auckland's humidity according to ilovetoblowthingsup
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Unread postAuthor: SpudBlaster15 » Mon Dec 03, 2007 9:26 pm

MrCrowley, are you using any mechanism to prevent the paintballs from rolling out the barrel when the launcher is tilted forward? When I initially installed a stopper in the barrel of my inline paintball gun, the paintballs would be subjected to too much compressive force upon firing, which caused them to burst. Readjusting the stopper solved this problem.
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Unread postAuthor: MrCrowley » Mon Dec 03, 2007 9:35 pm

Nah, perfectly straight smoothbore barrel with no stopper.
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Unread postAuthor: SpudBlaster15 » Mon Dec 03, 2007 10:48 pm

Seems somewhat strange that your paintballs are rupturing in the barrell. Tyler has fired this gun multiple times at 110PSI (which produces a muzzle velocity of ~890fps) without rupturing any paintballs.
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Unread postAuthor: MrCrowley » Mon Dec 03, 2007 10:53 pm

Yeah what's the humidity percentage over there?

Here after I freeze some PB's, after about 15minutes they're gone soft.
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Unread postAuthor: SpudBlaster15 » Mon Dec 03, 2007 11:37 pm

The humidity percentage does not matter so much as the air temperature, because it is expressed as a fraction of the air's maximum potential to suspend water vapor at the given temperature. With falling temperature, the air's capacity for moisture decreases, and our town's atmosphere reached a maximum temperature of -22*C today.
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