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Breech Load

A place to ask general spud cannon related questions.
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Breech Load

Unread postAuthor: risto » Mon Mar 19, 2007 8:32 pm

Looking for a new way to make a breech and for a bigger barrel.

Picture describes it all:
Image
(Metal rod is used as a grip/handle for loading)

I made a prototype earlier and it worked for my older 2" PVC pipe barrel perfectly. But once I put it on my newer 2" barrel, the couplings were too tight. Obviously the older pipe had a smaller outer diameter. Other than that, any suggestions?
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Unread postAuthor: A-98 » Mon Mar 19, 2007 8:45 pm

ZOMG! thats a dwv bell reducer!! :D

looks good, but as for the bigger barrel, i would say bore it out a tad more.
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Unread postAuthor: Velocity » Mon Mar 19, 2007 8:46 pm

It probably would work ok, but I personally don't like breech loaders that involve springs and manually loading in the projectile. It would be better if you just made that portion of the barrel seal with the breech cover, and you could move it by hand... this is just my preference however, and if you like the way your design feels, then go for it.

If you bore out the couplings a tiny bit (through the use of a dremel or even just some sandpaper) it would definitely help a lot.
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Unread postAuthor: risto » Mon Mar 19, 2007 9:32 pm

leave my DWV fittings alone! =]

and yeah, i was planning on boring them
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Unread postAuthor: experament-u2 » Tue Mar 20, 2007 2:49 am

is it a compression spring or one of the other ones
nice desgin tho
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Unread postAuthor: risto » Tue Mar 20, 2007 10:44 am

i think its "one of those other ones"
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