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my 2nd cannon

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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my 2nd cannon

Unread postAuthor: vanmaineac » Thu Mar 08, 2007 6:27 pm

this is my first rifle. the chamber is 22" long made of 1.5" pvc(38 cub. in.) the barrel is .5 in and is 4' long (9 cub. in.) The ratio is a little high at like 4:1 but it works out good. the valve is just a 1 in sprinkler valve.
the breech is from PVC ballistics with a slight change. The stock is blocked of with a piece of pvc. I am waiting on a scope but I can still fire it pretty accurately. My ammo of choice is a stick of fiber glass wrapped in duck tape to fit, it goes through a 1/4" plywood at 15 feet.
I'm also going to rifle the barrel but the last dowel I tried broke so I got to get a new one. I am going to paint it but I haven't got around to it yet.
Well thats it I just hope I posted right.
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Attachments
big cannon.JPG
this for when a small bullet isn't good enough
rifle butt off.JPG
removable rifle butt
breech closed.JPG
breech closed
breech open.JPG
breech open
rifle.JPG
the whole cannon
card board.JPG
I find carrots can be a good ammo for just shooting around.
bullet wound.JPG
I can't shoot anything more lethal than this... my dad won't let me

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Unread postAuthor: imablackskater » Thu Mar 08, 2007 6:33 pm

nice except why is the sprinkler valve on the bottom and does that stock do anything productive
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Unread postAuthor: vanmaineac » Thu Mar 08, 2007 7:00 pm

The stock is there to hold the scope when I get it but that might be a while.
I just had the sprinkler on the bottom because it fit for the trigger
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Last edited by vanmaineac on Fri Mar 09, 2007 7:47 am, edited 1 time in total.

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Unread postAuthor: risto » Thu Mar 08, 2007 7:22 pm

for the love of God, paint that thing! I cant stand purple primer stains!!

please?
:D
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Unread postAuthor: pyromaniac » Thu Mar 08, 2007 7:51 pm

nice 2nd but you really need to paint that thing!
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Unread postAuthor: vanmaineac » Thu Mar 08, 2007 8:22 pm

yeah I know I got the wrong paint the first time so I got to go and buy some.
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Unread postAuthor: itwentboom » Thu Mar 08, 2007 9:40 pm

Is that a belt i see? The gun on top in the pic looks like a belt for pants?
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Unread postAuthor: spudthug » Thu Mar 08, 2007 9:52 pm

i second risto....OMG...use clear freaking primer or paint it with like 5 coats of primer to cover up that uglieness....ugh...i hate purple primer and you should buy clear it makes your gun so much cleaner and better looking....so anyway its clean overall exept for the primer...i like it...
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Unread postAuthor: MrCrowley » Thu Mar 08, 2007 10:13 pm

I like the look of it(design not the stains) and the removable butt stock is freakin awesome. Nice huge cannon also you should of used a piston on the big cannon instead of those 2 sprinklers I think I see. Overall pretty good minus the stains. Looks like a nice plinker.
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Unread postAuthor: vanmaineac » Fri Mar 09, 2007 4:55 pm

yeah I got to get better on the stains
I got some paint though so I should be able to start that pretty soon.
I think that for my next cannon I'm going to use a piston valve

That is a belt it was the best thing i could find to brace the whole thing
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Unread postAuthor: zeigs spud » Fri Mar 09, 2007 6:53 pm

might want to extend the barrel on the 2 compression chamber cannon. look up c:b ratios (chamber:Barrel)

looks good LOVE the breech loader
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Unread postAuthor: vanmaineac » Fri Mar 09, 2007 11:13 pm

the barrel ratio for the big cannon is 2.5:1

Yeah I find the breech works really well
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Unread postAuthor: vanmaineac » Sat Mar 10, 2007 8:11 pm

now I have it painted

I ran out so I couldn't finish the barrel
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painted.JPG
that does look much better

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