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The pee wee fun gun!

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: Counterstriker » Mon Mar 10, 2008 5:45 pm

Was the chamber just galvanized steel nipple?
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Unread postAuthor: Mitchza89 » Mon Mar 10, 2008 11:37 pm

I wouldn't call it a nipple, just a short piece of threaded galvanised pipe.
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Unread postAuthor: spud=fun » Sun Mar 16, 2008 9:17 pm

lol i wouldn't want to say eye out around this thing :) very clean nice job
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Unread postAuthor: Mitchza89 » Sun Mar 16, 2008 10:18 pm

Haha thanks alot mate.
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Unread postAuthor: Cosmic Muffin » Mon Mar 17, 2008 5:19 am

WOW i like this beast can it kill people?
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Unread postAuthor: Mitchza89 » Mon Mar 17, 2008 7:17 am

Haha wouldn't have a clue mate but she makes short work out of rats and toads ;)
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Unread postAuthor: Counterstriker » Tue Mar 25, 2008 7:52 pm

May I ask how you kept it stable in the chamber? I am running into in problems in my cannon. If you would could you click the link in my sig?

Thanks again! :D
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Unread postAuthor: Mitchza89 » Tue Mar 25, 2008 7:58 pm

Yeah mate the link is there. At that size, I don't use a barrel support. The grip from the comp fitting is enough to hold it in place.

This little gun will never live again with that configeration. The pilot is just huge. I've modded a ball valve into a trigger system with a galvanised long bend at the back, like a grip. It's like BTB's system. It couldn't be any better. I've got it hooked up to my long 8mm and the power is just crazy....

I'll have to post it soon.

EDIT! With the larger bb gun's, I cut off a 20mm long piece of 1/2'' copper piper and hammer it into an oval, so it's tight enough to hold the pipe in the one spot, and it's flair out enough to take the gap inside the chamber. Hope this helps mate.
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Unread postAuthor: Counterstriker » Wed Mar 26, 2008 8:32 pm

Mitchza89 wrote:Yeah mate the link is there. At that size, I don't use a barrel support. The grip from the comp fitting is enough to hold it in place.

This little gun will never live again with that configeration. The pilot is just huge. I've modded a ball valve into a trigger system with a galvanised long bend at the back, like a grip. It's like BTB's system. It couldn't be any better. I've got it hooked up to my long 8mm and the power is just crazy....

I'll have to post it soon.

EDIT! With the larger bb gun's, I cut off a 20mm long piece of 1/2'' copper piper and hammer it into an oval, so it's tight enough to hold the pipe in the one spot, and it's flair out enough to take the gap inside the chamber. Hope this helps mate.


Yah that last thing seems like a good idea, Earilier I was drilling a hole in a 1/2" copper to try to keep the barrel stable, since I don't own a drill press at this house so I had to hold it, My finger slipped and my hand and cit my thumb up pretty bad. Pff.. I think I will just make one out of epoxy putty.
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Unread postAuthor: locksmith » Wed Mar 26, 2008 9:34 pm

very nice looks like a fun pistol keep up the great builds
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Unread postAuthor: Mitchza89 » Fri Mar 28, 2008 8:05 pm

Haha cheers mate. I just checked out your gun just then, she looks great. :D
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Unread postAuthor: Counterstriker » Mon Mar 31, 2008 7:30 pm

Mitchza89 wrote:Haha cheers mate. I just checked out your gun just then, she looks great. :D


Thanks she's done :D (in the sig) How much did the pump cost you to make?
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Unread postAuthor: Mitchza89 » Mon Mar 31, 2008 8:09 pm

Ah it's hard to say. I recycled alot of the parts over the years but 40-50 I'm guessing. Not a great deal concidering that the commerical high pressure pumps are 120+ bucks and can't go past 260psi :D
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Unread postAuthor: Counterstriker » Mon Mar 31, 2008 8:35 pm

Sounds good, I think I will make one just for my new piston.. How'd you make yours exactly?
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Unread postAuthor: Mitchza89 » Mon Mar 31, 2008 8:54 pm

I just used 20mmx15mm compression fittings for the 20mm copper chamber body (20mm part of the comp fitting is to clamp the pipe, the 15mm side is male). 1x 15mm m/f/m Tee. For the check valve, I used a a spring, a bolt and an O ring. I stuck a washer with an O-ring under it in the female part of the Tee, (it narrows right off so the washer won't fall through into the Tee, it's a nice snug fit. The O-ring makes a perfect seal without having to use epoxy) When you stick the washer and o-ring into the tee, you use the male end of the comp fitting and screw it in tight into the tee. That squeezes the o-ring agaisnt the Tee wall and the washer to make a air tight seal that can hold at 400+ psi. The Piston head is just 20x 1/4'' washers, (I think thats the size....If not, just look at ya local hardware for the right size) A meter of 1/4'' threaded rod cut to size as the shaft, and a size 10 O-ring to make the seal and ofcourse a couple of nuts.

Hope this helps mate. If not, I'll come up with some diagrams for ya.

Cheers
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