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pneumatic marker project

Discuss miniature cannons built from things such as pill bottles and pen caps.
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Unread postAuthor: Eddbot » Sun Apr 06, 2008 11:39 pm

dude, awesome cat, what pressures does it get to? and post damage pics!:D
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Unread postAuthor: Sticky_Tape » Mon Apr 07, 2008 3:41 pm

Ha, Ha, funny Edd I think she gets up to 14.7 psi (atmosphereic pessure)
Ok the damage pics I got are look at descriptions
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100-0040_IMG.JPG
The hole from a 4.5mm bb with wadding.
100-0039_IMG.JPG
Right side of P.I.T.A. broken tempered glass
100-0036_IMG.JPG
Turns out it was G.D. Tempered glass when I shot the glass it shattered into little tiny shards compromising the garbage bag I meticulously placed under the pane of glass hoping that the glass would just slide down onto it. Yes I feel very strongly about this it took me 2 hours to clean up the glass posponing the time for the pictures to get to you hope you are happy.
100-0035_IMG.JPG
Before picture of a unknown type of glass
You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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Unread postAuthor: Sticky_Tape » Mon Apr 07, 2008 4:35 pm

Oh great nobody even coments on the pics. Sorry for the double post.
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You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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Unread postAuthor: Eddbot » Mon Apr 07, 2008 6:57 pm

nice job on the glass, too bad you didn't have a vacuum, i'm still waitin on the damage pics of the cat :)
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Unread postAuthor: Sticky_Tape » Mon Apr 07, 2008 7:27 pm

Here you go Eddbot this scratching was done by my cay Amber while she was pressurized to 14.7 psi her arms where motivated by pneumatic cylinders which were lubed with patroleum jelly
:P
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100-0001_IMG.JPG
Tee Hee.
You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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Unread postAuthor: Eddbot » Mon Apr 07, 2008 7:52 pm

looks dangerous, make sure you don't point it at anything, those claw darts could cause some serious damage :D
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Unread postAuthor: Sticky_Tape » Mon Apr 07, 2008 7:57 pm

:lol: absolutly! :lol:
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You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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Unread postAuthor: jackssmirkingrevenge » Tue Apr 08, 2008 6:05 am

Nice, you can use it to escape from a sinking car :D
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Unread postAuthor: Sticky_Tape » Tue Apr 08, 2008 6:10 am

To tell you the truth JSR that is exactly what I was thinking when I was picking up the glass. Cool.
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You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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Unread postAuthor: jackssmirkingrevenge » Mon Jan 05, 2009 1:37 pm

Well, it's happening finally :) A little different from thye original brief in that I want to fit it in an actual marker rather than a marker sized launcher. In that regard, I made it using a syringe tube chamber and I intend to fill the space between it and the marker body with epoxy, which should give enough strength for a couple of hundred psi.

Here's a pic of the internal bits before I glue it all up:
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Unread postAuthor: Sticky_Tape » Mon Jan 05, 2009 3:32 pm

Looks good JSR what i/d is the barrel I am guessing 6mm from the size of the shrader.
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You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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Unread postAuthor: jackssmirkingrevenge » Mon Jan 05, 2009 3:38 pm

Spot on, it's the traditional 6mm brass barrel, ported at the end in the hope that the hollow front end of the marker body will provide an expansion chamber that will take some edge off the muzzle blast.

With a barrel length of just over 3 inches and a tiny chamber, I'm prediciting performance will be very much on the low end of the scale, but it's one of those "had to be done" projects so if it works while still looking mostly like an innocent marker I'll be a happy man, we'll find out tomorrow :)
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Unread postAuthor: Floyd » Mon Jan 05, 2009 3:46 pm

Looks like it will be fun. So when is estimated testing time? I'd like to see this compared to your pen gun in performance.
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Unread postAuthor: jackssmirkingrevenge » Mon Jan 05, 2009 3:58 pm

Floyd wrote:So when is estimated testing time?


When I get home from work tomorrow, so around 20 hours starting *presses stopwatch button* now!
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Unread postAuthor: super spuder » Mon Mar 30, 2009 5:49 pm

il be waiting :lol: better not be longer than 1 second over 20 hours! nice damage pictures from the cat to, wouldn't want to meet that think in the litter box
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trying to decide on a new project, probably something small.
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