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small coax piston 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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small coax piston gun

Unread postAuthor: jook13 » Thu Oct 23, 2008 9:36 pm

So here is a small little thing I made with a few spare pieces of copper I had laying around. While one of the simplist launchers I have made, it was also one of the toughest to make.

So anyways, there is nothing too special here, nothing that has never been done, but I am proud of my first working coax.

Performance wise, it is nothing spectacular, as to be expected from something of this size. At 400 psi I was able to sink a nail 3/4 an inch into a 2x4. Around 100 psi and I am lucky if the nail sticks.


specs...

valve... coax epoxy cast with a rubber washer. actuated by the schrader.
barrell... 1/4 inch copper around 10 inches long
chabmer... 1/2 inch copper around 9 inches long
everything else... epoxy
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Attachments
miniparts.jpg
here are all the parts before it gets epoxied together...
minipiston.jpg
the piston
minipiston.jpg (39.92 KiB) Viewed 2790 times
fullmini.jpg
the full thing assembled... and a nail dart next to it. the keys are for size reference.
Last edited by jook13 on Thu Oct 23, 2008 10:27 pm, edited 1 time in total.
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Unread postAuthor: pizlo » Thu Oct 23, 2008 9:50 pm

Well its small, so that performance isn't bad at all. Plus its shiny so I love it. Maybe hack up a blowgun for a better pilot?
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Unread postAuthor: jook13 » Thu Oct 23, 2008 9:54 pm

I am actually building a larger version with a blowgun pilot now. the new version is about 4 feet long. has the same size barrel but 3/4 copper pipe for the chamber. it may be a while because I plan on great things for it. This mini was a test run at a coax.
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Last edited by jook13 on Thu Oct 23, 2008 10:28 pm, edited 1 time in total.
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Unread postAuthor: Gippeto » Thu Oct 23, 2008 10:27 pm

Very nice Jook, an effective use of "spare" materials! :D
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Unread postAuthor: psycix » Sat Oct 25, 2008 8:21 am

Awesome project!
Looks fun to me.
Use a CO2 bike tire inflater and youve got yourself an highly portable plinker.
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Unread postAuthor: jackssmirkingrevenge » Wed Nov 18, 2009 12:17 pm

I had missed this but it caught my eye in the "random cannon" corner, beautifully made and very similar in terms of construction technique to the small coaxials I like to make, nicely done :)
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