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 pneumatic marker project « View previous topic :: View next topic » 
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Eddbot
PostPosted: 04/06/2008 22:39 PM    Post subject: Reply with quote

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dude, awesome cat, what pressures does it get to? and post damage pics!Very Happy
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Sticky_Tape
PostPosted: 04/07/2008 14:41 PM    Post subject: Reply with quote

Brigadier General
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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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Sticky_Tape
PostPosted: 04/07/2008 15:35 PM    Post subject: Reply with quote

Brigadier General
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Oh great nobody even coments on the pics. Sorry for the double post.
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Eddbot
PostPosted: 04/07/2008 17:57 PM    Post subject: Reply with quote

Lieutenant Colonel
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nice job on the glass, too bad you didn't have a vacuum, i'm still waitin on the damage pics of the cat Smile
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Sticky_Tape
PostPosted: 04/07/2008 18:27 PM    Post subject: Reply with quote

Brigadier General
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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
Razz
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Eddbot
PostPosted: 04/07/2008 18:52 PM    Post subject: Reply with quote

Lieutenant Colonel
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looks dangerous, make sure you don't point it at anything, those claw darts could cause some serious damage Very Happy
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Sticky_Tape
PostPosted: 04/07/2008 18:57 PM    Post subject: Reply with quote

Brigadier General
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Laughing absolutly! Laughing
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jackssmirkingrevenge
PostPosted: 04/08/2008 5:05 AM    Post subject: Reply with quote

aspiring machinist
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Nice, you can use it to escape from a sinking car Very Happy
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Sticky_Tape
PostPosted: 04/08/2008 5:10 AM    Post subject: Reply with quote

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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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jackssmirkingrevenge
PostPosted: 01/05/2009 12:37 PM    Post subject: Reply with quote

aspiring machinist
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Well, it's happening finally Smile 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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Sticky_Tape
PostPosted: 01/05/2009 14:32 PM    Post subject: Reply with quote

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Looks good JSR what i/d is the barrel I am guessing 6mm from the size of the shrader.
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jackssmirkingrevenge
PostPosted: 01/05/2009 14:38 PM    Post subject: Reply with quote

aspiring machinist
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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 Smile
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Floyd
PostPosted: 01/05/2009 14:46 PM    Post subject: Reply with quote

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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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jackssmirkingrevenge
PostPosted: 01/05/2009 14:58 PM    Post subject: Reply with quote

aspiring machinist
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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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super spuder
PostPosted: 03/30/2009 16:49 PM    Post subject: Reply with quote

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il be waiting Laughing 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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