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Coxial 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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Coxial rifle

Unread postAuthor: tghhs » Wed Sep 30, 2009 4:49 am

Hey guys,

this is my latest creation:

http://img16.imageshack.us/gal.php?g=30092009816.jpg

It has a 1/4 inch barrel in a 40mm pn 12 pvc chamber. The piston is a solid teflon plug that i tuned down on a drill press and chisel (just like technician1002 did on his QDV cannon) the barrel support is just a few plywood disks glued together with flutes down the sides.

i was having some problems with it: http://www.spudfiles.com/forums/closing ... 19351.html

In one of the pic's you can see the teflon plug that i made to solve this issue, i didn't want to have to drill and screw it in so i used a tube clamp on the end to just slightly squeeze the end, this also allows for me to completely disassemble the cannon for servicing if needed.
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Unread postAuthor: inonickname » Wed Sep 30, 2009 5:12 am

I'd never trust a hose clamp for that. Treat it is armed and "could explode at any time" all the time.

Some pictures would be nice.
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Unread postAuthor: tghhs » Wed Sep 30, 2009 5:16 am

Yeh i guess, i'm only running it at ~ 90 max atm (all my compressor can do) but i had to use a lot of force to get the plug in the tube in the first place and the hose clamp squeezes it quite a bit, i trust it alot.
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Unread postAuthor: inonickname » Wed Sep 30, 2009 5:23 am

"quite a lot of force" often isn't very good reasoning.

At 90 psi it's exerting around 159 lbs of force on that plug at any given time.
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Unread postAuthor: jackssmirkingrevenge » Wed Sep 30, 2009 5:27 am

Image

Not bad, damage pics?

I would epoxy that plug though, as inonickname suggests it's under a lot of force and could easily turn your barrel into an uncomfortable javelin.
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Unread postAuthor: tghhs » Wed Sep 30, 2009 5:35 am

I dont wanna glue it in coz i wont be able to disassemble it for repairs, but i may i may do something else with it. yeh i'll take some damage pic's soon

I'm making some ice bullets for this thing too, so watch out kenedy :P
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Unread postAuthor: jackssmirkingrevenge » Wed Sep 30, 2009 5:37 am

tghhs wrote:I dont wanna glue it in coz i wont be able to disassemble it for repairs, but i may i may do something else with it.


At the very least you should pop a couple of screws into it.
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Unread postAuthor: Crna Legija » Wed Sep 30, 2009 5:49 am

yea the plug looks dangers but you can cut some wood discs and put it in front where the hose clamp is. then screws it down tight.

but still nice. get some damage pics
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Unread postAuthor: tghhs » Wed Sep 30, 2009 5:53 am

Well just tried the ice round ~ 5 cm long and yeppp just exploded as soon as it left the barrel :(
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Unread postAuthor: Mr.Sandman » Wed Sep 30, 2009 1:37 pm

Really man epoxy it or pop some srews in your asking for throuble.Besides if it breaks then just make a new one. It would make spudfiles look bad if a "Local teen killed by spudgun barrel" news article popped up on the web. it also not a rifle btw. its a cannon.
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Unread postAuthor: tghhs » Wed Sep 30, 2009 6:24 pm

Mr.Sandman wrote: it also not a rifle btw. its a cannon.


na it's a rifle, an extremely low powered one but common 1/4 OD barrel, i ain't exzactly launching a huge shell like a full lemon
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Unread postAuthor: noname » Wed Sep 30, 2009 6:35 pm

A rifle is rifled. Simple, no? That is a small cannon.
Also, there is a spell check button. You may want to look into that.
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Unread postAuthor: tghhs » Wed Sep 30, 2009 7:02 pm

LOL ops an extra "z" soz, na if some one asks me i'll say it's a rifle because my mates cannon is tennis ball size and i wouldn't want to give the wrong idea

http://en.wikipedia.org/wiki/Rifle

http://en.wikipedia.org/wiki/Cannon

do you really think it's more like the second link?
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Unread postAuthor: jmadden91 » Wed Sep 30, 2009 7:07 pm

noname wrote:A rifle is rifled. Simple, no? That is a small cannon


Lol in theory :roll: :D

Edit:
tghhs wrote:do you really think it's more like the second link?
Lol but mate the first line of the rifle link confirms what noname is saying

wikipedia wrote:A rifle is a firearm designed to be fired from the shoulder, with a barrel that has a helical groove or pattern of grooves ("rifling") cut into the barrel walls.
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Last edited by jmadden91 on Wed Sep 30, 2009 7:11 pm, edited 1 time in total.
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Unread postAuthor: tghhs » Wed Sep 30, 2009 7:11 pm

thats true but for a "commoner" saying "rifle" makes things heaps simpler to explain

Edit:

i'm saying it looks more like a 'rifle' than a cannon it's that simple!
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Last edited by tghhs on Wed Sep 30, 2009 7:17 pm, edited 1 time in total.
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