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Copper marble rifle

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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Copper marble rifle

Unread postAuthor: haulinick » Sun Oct 15, 2006 8:06 pm

Here is my new copper rifle. It is a coaxial style gun with a 1/2" barrell in a 1" chamber. it uses a 1/2" ball valve as a fill valve and also a pilot valve for the piston. The piston is made out of a solid piece of epoxy putty with a rubber gasket on one end. it is VERY effective from what I've seen. I've only taken it to 80 psi so far. I'm waiting to get comfortable with it before i really push it. My solder job isn't the greatest looking but I'm confident it is plenty strong enough. I used the solder the same way you would use pvc cement. I put it on the pipe and then slid the fitting over it while it was liquid. Then i soldered it the "normal" way around the outside.
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Unread postAuthor: Pyro Ninja » Sun Oct 15, 2006 8:10 pm

How for can it shoot :)
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Unread postAuthor: haulinick » Sun Oct 15, 2006 8:17 pm

I dont know how far, but It makes nice holes in particle board like its nothing.
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Unread postAuthor: rna_duelers » Sun Oct 15, 2006 8:20 pm

Nice little copper gun,i would trust it to 200psi.So when will we see some damage pics?
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Unread postAuthor: haulinick » Sun Oct 15, 2006 8:22 pm

thanks rna.
I didn't have alot of time for testing today. I'll get some pics of what it does during the week.
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Unread postAuthor: mark.f » Sun Oct 15, 2006 9:02 pm

Did you use flux for soldering?
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Unread postAuthor: haulinick » Sun Oct 15, 2006 9:07 pm

markfh11q wrote:Did you use flux for soldering?

Not to sound like a jerk, but of course i did. Was I not supoosed to for some reason i dont know of???
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Unread postAuthor: KVINCEO » Sun Oct 15, 2006 10:27 pm

i like the 45 elbow on there, gives it that vintage pirate musket type of grip. very nice
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Unread postAuthor: mark.f » Mon Oct 16, 2006 6:05 am

Not to sound like a jerk, but of course i did. Was I not supoosed to for some reason i dont know of???


No, you're supposed to. I was just seeing because the way you described soldering was kind of funny. :)
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Unread postAuthor: GalFisk » Tue Oct 17, 2006 6:29 am

Without flux it's almost impossible to get solder to stick, so that's pretty much a given.
In the future it would be a good idea to do the soldering the proper way, it will be prettier and is easier to do.
That said, nice gun. I run my copper guns at 300 psi routinely, so it has a lot of potential. What ammo do you use?
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Unread postAuthor: haulinick » Tue Oct 17, 2006 5:24 pm

I found marbles at a craft store that fit the 1/2 copper perfectly.
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Unread postAuthor: Flying_Salt » Tue Oct 17, 2006 5:29 pm

How long did soldering take? I'm a newbie with copper guns...
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Unread postAuthor: haulinick » Tue Oct 17, 2006 9:10 pm

i only had 3 joints to solder so it took bout 20-30 minutes. Most of the time I was trying to get the 1/2" pipe centered so that the piston would work right.
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