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Breach loading, small pipe

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Breach loading, small pipe

Unread postAuthor: Marco321 » Thu May 17, 2007 12:34 am

Hey
Iv done some searching on breech loaders and didn't find anything for small barrel rifles. My barrell is 15mm or the perfect size for a normal marble to fit in. I was wondering if anyone had a relativly fast breech loading system. My current way is done because the barrel screws onto my valve so i just unscrew the barrell and put in the ammo.
Thanks
Marco
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Unread postAuthor: skinner » Thu May 17, 2007 1:27 am

Search the forums a little more carefully next time.
This is the easiest form of breech loading in my opinion:
poorman's breech

He made a mistake on that page though. you have to use a piece of pipe, with the same inside diameter as the outside diameter of your pipe, ie. a 20mm conduit barrel, using 25mm conduit as the sleeve is ideal, seeing as the 25mm has an I.D of 20mm.

Good luck.

--Skinner
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Unread postAuthor: Marco321 » Thu May 17, 2007 1:49 am

Thanks heaps, i must of missed that one :P
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Unread postAuthor: frankrede » Thu May 17, 2007 6:51 am

You could drill a hole in teh barrel the size of your ammo and add a coupler with the stopper ground out and slide it over the hole when you are shooting
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Unread postAuthor: skinner » Thu May 17, 2007 7:08 am

Well, technically, isnt that the same as the poormans breech?
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Unread postAuthor: Marco321 » Thu May 17, 2007 7:39 pm

Hey
I used the poor mans breech thing and put a handle on it so its kinda like a bolt action rifle. I was wondering if there was a way to make it 100% airtight, it is reltivly airtight at the moment but i was wondering if i could make it 100% airtight
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Unread postAuthor: brony » Tue May 22, 2007 2:43 am

hey,

if you want to make it really air tight you can use o rings, or you can just put some duct tape between the barrel and the breech
hope that helps!
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