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i've been busy 3rd gun in 9 days

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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i've been busy 3rd gun in 9 days

Unread postAuthor: absinthe » Fri Aug 21, 2009 8:47 am

yep i think i have a fever, SPUD-GUN fever.

my third gun (second copper) in 9 days, i think you can all see where I'm influenced from (thanks brain :D)

i used the same type of piston as on my coaxial but i used 2 tap washers at the back to make it more stable.

i think it looks very "steam punk" so I'm in love with its looks (i would like to have a brass ball valve and a brass or copper trigger and i may build one, and yes i know i need to do something about the tape.. and im gonna do some more polishing)

no damage shots as yet as i run out of time today to take some shots.. and I'm yet to test it at 250psi.. but at 150 it would make a nice nail gun (to be used at 5+mtrs)

i think i will also add another copper pipe under the barrel to hold the ram rod with a nice black stained wooden handle.

i was toying with the idea of annealing the tip of the barrel and flaring it slightly what you think?

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*edit i thought it had been longer (2 weeks) but i made my first one 9 days ago

*edit, progress pics...

i made a nice wooden grip with some copper strips to hold everything in place.. i may redo it as i cracked the wood cause i screwed to close to the end and i also want to put the ram rod in there somewhere

(each side is a kinda tear drop shape so its nice and curved and great to hold)

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Last edited by absinthe on Wed Aug 26, 2009 8:18 am, edited 1 time in total.

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Unread postAuthor: inonickname » Fri Aug 21, 2009 9:23 am

Don't even anneal it, just use a pipe flarer and flare it as it is, then clean up with sandpaper is needed.

Very nice.. Only thing I can think of to say is to trim up the BV handle a little more..but it's very dandy. Maybe a barrel brace though, but it seems you have it covered.
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Unread postAuthor: twizi » Fri Aug 21, 2009 11:00 am

looks like btb sawed of riot gun but u used copper instead of steel
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Unread postAuthor: qwerty » Fri Aug 21, 2009 11:08 am

Man, i bet that things so loud :shock:
cool gun though i agree with twizi it does look like a BTB gun with copper 8)
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Unread postAuthor: jrrdw » Fri Aug 21, 2009 4:09 pm

BTB = BriantheBrain.

Welcome to Spudfiles.
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Unread postAuthor: Brian the brain » Fri Aug 21, 2009 5:22 pm

Thanks for reviving this design!
After 3.5 years I still love it.
I'm building Sawed-off mark III as we speak...Just need to replace the leaky ballvalve ( oh the abuse it took...) and she's ready to be lacquered.
The wood that is..
I managed to get a wooden handle on the bent pipe.. :D
A front " pump" handle finishes up the look.

If I had some darn batteries I could take a picture...
I see you use compression fittings.

Try and find a brass 15 mm ballvalve.The compression kind.
Remove the rings and olives and replace the current BV with it.
Or, if you can find one just juse a BV with outside threads..
That will eliminate the two fittings used on the ballvalve now.


Get is as compact as you can.
You have actually gotten the look and feel of it down better than any other copy I have seen.
Have fun, be safe!
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Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: absinthe » Fri Aug 21, 2009 6:15 pm

thank BTB i cant wait to see your number 3, good idea about the male threaded ball valve, ill see if i can get my hands on one...

i wanted to use a 3/4 inch barrel but i couldn't find a T that would house the piston.. so instead of a saw off shot gun like yours mines more of a steam punk dueling pistol lol
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Unread postAuthor: absinthe » Sun Aug 23, 2009 8:49 am

ok double post.. but i took her to 340psi today and man it sounded like a gun shot!!!!! cant wait to get to 450+ (type B (normal water pipe) pipe has a max working pressure of 3,970 kPa or 575psi http://www.csgnetwork.com/presskpapsicvt.html )
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Would this work??

Unread postAuthor: jsefcik » Fri Jul 15, 2011 10:32 pm

I have an old propane cyclinder(blow torch type) and wanted to use it as an air chamber and tap the tire valve into the side and connect the sprinkler valve where the original propane head was by tapping it or something, If it doesn't work oh well.
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Unread postAuthor: Mr.Tallahassee » Sat Jul 16, 2011 2:04 am

jsefcik: If you would please, open a new thread in the pneumatic discussion. No need to revive a two year old thread.
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