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burst disk 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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burst disk cannon!

Unread postAuthor: spudthug » Mon Apr 30, 2007 7:33 pm

hey all this is my burst disk cannon. i jsut made it today when i was at my freinds and i saw a 1 inch union... i asked if i could have it he said sure.. so i built a cannon around it..it is kinda ghetto but not alot. the onyl burst disks ive used so far are foil, does anyone know any good burst disks that usually burst at about 120-130 psi?? or higher so i can activate it with a pin in the back of my ammo..i would just drop it in the barrel and yay! it goes off. well enjoy and thanks if u suggest burst disks!!

sorry for bad pics it is dark in my room.. ill have damage and more results tomorrow with better pics!

oh and btw the specs

chamber: 1.5"x6"
barrel: 1"x(something near 2.5 feet)
valve: uniopn burst disk
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Attachments
IMG_0409.JPG
looking straight at the chamber
IMG_0409.JPG (38.45 KiB) Viewed 744 times
IMG_0408.JPG
schrader
IMG_0408.JPG (37.53 KiB) Viewed 744 times
IMG_0407.JPG
psi guage
IMG_0407.JPG (34.23 KiB) Viewed 744 times
IMG_0406.JPG
looking from the front down
IMG_0405.JPG
my beast!!!
IMG_0412.JPG
here is the pics of the board showing how thick it is and how the ammo went the whole way through
IMG_0411.JPG
holes made with a 1/2 copper rocket
IMG_0410.JPG
the gun with the two barrels beside it
Last edited by spudthug on Tue May 01, 2007 7:25 pm, edited 1 time in total.
4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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Unread postAuthor: super spuder » Mon Apr 30, 2007 7:48 pm

that is pretty good. i bet it will do some damage, what are you going to shoot out of it?
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Unread postAuthor: Spyider » Mon Apr 30, 2007 8:31 pm

it would be better if we could actually see the photo's, next time take picks outside for better light.
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Unread postAuthor: spudthug » Mon Apr 30, 2007 8:48 pm

it would be better if we could actually see the photo's, next time take picks outside for better light.


do you read? i stated that it is dark in my room and it is late

oh and any suggestions on burst disks??
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4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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Unread postAuthor: turbohacker » Mon Apr 30, 2007 8:56 pm

try some thin sheet meatal like higher than 20 guage
or mabe some plastic from a milk jug or somthing
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Unread postAuthor: spudthug » Mon Apr 30, 2007 8:59 pm

oo milk jug plastic! thanks! ill be off now..going to make burst disks..be back in morning
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4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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Unread postAuthor: noname » Mon Apr 30, 2007 9:03 pm

I couldn't get milk jug plastic to burst, even at 150 psi. And there's no way in hell the ammo is going to be able to pop the disc at that angle.

And just so you know, you're union is leaking like hell unless you put a couple gaskets on, so if you didn't, get a couple. :wink:
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Unread postAuthor: spudthug » Tue May 01, 2007 5:59 am

yea i put teflon tape around where the union sits :P

A
nd there's no way in hell the ammo is going to be able to pop the disc at that angle.


i know.. that wasnt really for legs but it worked out.. i just made it from all the parts i had and it ended up like that.. notice how i used a ball valve with no handle for the 1/2 coupler
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4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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Unread postAuthor: rad14701 » Tue May 01, 2007 4:50 pm

Rather than simply using aluminum foil for the burst disc you could use disposable aluminum baking or roasting pan foil... Most discount stores sell sets of them for about a dollar... It's halfway between aluminum foil and aluminum can in weight...

Milk jug plastic is way too tough to use for burst discs...
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Unread postAuthor: spudthug » Tue May 01, 2007 7:26 pm

new pics in first post plus damage!! wow this is powerful.. btw my burst discs was two layers of playing cards and they broke at 115 psi[/code]
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4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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