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burst disc nail 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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burst disc nail gun

Unread postAuthor: Cosmic Muffin » Wed Jan 14, 2009 9:53 pm

this is just a parts gun, kinda "ghetto"
whipped it up when i was sh!t bored yesterday.
i made this dart from a presta valve cap and a nail, put it into a chunk of wood so you guys can have a look at that when i get the pic up.

i use 6 layers of aluminum foil

thats dads shock pump there
lucky he is in Adelaide today :P

<a href="http://tinypic.com" target="_blank"><img src="http://i40.tinypic.com/vxheo1.jpg" border="0" alt="Image and video hosting by TinyPic"></a>

note the crazy green thing, its a tap-hose attachment, skillfully converted to a very basic breech loading system :D

<a href="http://tinypic.com" target="_blank"><img src="http://i43.tinypic.com/fdra8m.jpg" border="0" alt="Image and video hosting by TinyPic"></a>
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Unread postAuthor: Mitchza89 » Wed Jan 14, 2009 9:59 pm

Nice mate, nice. That would be a fun little gun :D.
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Unread postAuthor: Cosmic Muffin » Wed Jan 14, 2009 10:13 pm

yer it aint too bad.
but preparing the discs is a real bugger.
makes a cool sound tho. like a .22
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Unread postAuthor: jon_89 » Wed Jan 14, 2009 11:00 pm

What pressure do you use it at? I do the same thing when I am bored out of my mind, go to the spare parts bucket and attempt to make something worthy or not.
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Unread postAuthor: Hotwired » Wed Jan 14, 2009 11:29 pm

I wonder how many people have made that style cannon before.

I know my first ball valve looked pretty much identical to that. Except it was copper.
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Unread postAuthor: Cosmic Muffin » Thu Jan 15, 2009 1:39 am

i have only used it at 100 psi cos there is a leak.
i think heaps of people have, its just simple but good :)
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Unread postAuthor: psycix » Thu Jan 15, 2009 9:28 am

Where does it leak?
This should be good for a higher pressure (besides the green thing and possibly the PVC elbow though).
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Unread postAuthor: Cosmic Muffin » Thu Jan 15, 2009 9:22 pm

yer i know, its at the pvc elbow, i think i was a bit stingey with the thread tape :P
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Unread postAuthor: psycix » Mon Jan 19, 2009 5:18 am

Always apply more teflon tape then you think you need to.
I usually stick to 5 layers, which is quite alot while winding it.
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Unread postAuthor: Cosmic Muffin » Mon Jan 19, 2009 7:16 pm

yer i did about three. but i wasnt looking to win the best gun contest lol
i just wanted to see the difference between burst disk and no burst disk
so i didn't really want to waste too much of my expensive tape
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Unread postAuthor: psycix » Wed Jan 21, 2009 4:10 pm

my expensive tape

One roll of teflon tape is typically bought for one or two bucks. You may even find cheaper stuff on occasion.
Next to that, its much more of a waste if you find out that your fitting leaks because you added too less tape and got to add tape again.
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Unread postAuthor: Cosmic Muffin » Wed Jan 21, 2009 6:52 pm

lol mate i was joking, tape is 99c here
:P
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Unread postAuthor: airheadnoob » Sun Feb 15, 2009 12:31 am

Cosmic Muffin wrote:i have only used it at 100 psi cos there is a leak.
i think heaps of people have, its just simple but good :)
yeah i made 1 like that but it broke all my pumps cause i wanted more power then 100 psi i tried for 200 but the pumps where cheap and broke at 130psi
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Unread postAuthor: ckman » Sun Feb 15, 2009 3:47 am

broke all my pumps cause i wanted more power then 100 psi i tried for 200 but the pumps where cheap and broke at 130psi


I think you should make a shock pump or a fridge compressor if you want more pressure or buy one its better than to keep spending money on bike pumps.
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Unread postAuthor: inonickname » Sun Feb 15, 2009 6:42 am

airheadnoob wrote:
Cosmic Muffin wrote:i have only used it at 100 psi cos there is a leak.
i think heaps of people have, its just simple but good :)
yeah i made 1 like that but it broke all my pumps cause i wanted more power then 100 psi i tried for 200 but the pumps where cheap and broke at 130psi


Is it just me, or do all of these guy's posts make you think he has his name for a reason..? Bike pumps are really only needed to go 40ish psi, or however much you put in your tire...
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