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smallest *working* gun on spudfiles: pico-ax

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smallest *working* gun on spudfiles: pico-ax

Unread postAuthor: jackssmirkingrevenge » Sat Feb 27, 2010 11:42 am

After this recent challenge I couldn't help but rise to the task of making the smallest possible (within reason) co-axial. Since the irreducable component is the schrader filling/pilot valve, I figured I might as well use the schrader body as the chamber.

Barrel is a 10mm long 1mm calibre length of brass tube, naturally power is laughable at best, a steel BB will ricochet off a sheet of paper - but it works :)

edit: did some more testing cranked up to 500 psi, a 1mm BB will happily punch through 2 sheets of paper. I tried using a length of 1mm rod as ammunition to make it more visible in high speed, the heavier weight and reduced velocity made it ricochet off the paper.





Here's a test video at 1000 frames per second:



edit: cleaned it up on my drill-in-vice "lathe" and updated the photos.
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Attachments
picocoax1.JPG
The finished article posed with my grubby fingers
picocoax2.JPG
5000 1mm BBs for scale
Last edited by jackssmirkingrevenge on Wed Aug 31, 2016 6:02 am, edited 6 times in total.
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Unread postAuthor: POLAND_SPUD » Sat Feb 27, 2010 11:50 am

kudoz :shock:
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Unread postAuthor: far_cry » Sat Feb 27, 2010 11:52 am

wow that one piece of art :) :)

i think this canon can be used by the fly's between them :D
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Unread postAuthor: Hawkeye » Sat Feb 27, 2010 11:53 am

Nice. You could probably modify a cap gun and use a bunch of these as shells.
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Unread postAuthor: qwerty » Sat Feb 27, 2010 12:14 pm

Cool, whats the chamber?
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Unread postAuthor: Brian the brain » Sat Feb 27, 2010 12:29 pm

Pico-ax LOL!!!

Cool, whats the chamber?


The chamber is the part where the pressure is stored.
AKA the reservoir...

:D

How big of you to rise to the occasion JSR...
Too bad the power is so bad.

You might need a better exhaust valve..like a 2" piston valve perhaps..
Pilot volume is probably too big ..
You could GGDT this little forker to optimise dimensions..or make that minimise..

:lol:

More serious:
Maybe you could add a stock or something to turn it into a true miniature piece of art.
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Gun Freak wrote:
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: jackssmirkingrevenge » Sat Feb 27, 2010 1:15 pm

You could probably modify a cap gun and use a bunch of these as shells.


Certainly a possibility but you're want to scale it up a little, more like this.

How big of you to rise to the occasion JSR...


JSR - always keen to show that he's not compensating for anything :D

Too bad the power is so bad.


Technically at 800 psi there will be around twice the power, who knows it might actually penetrate a sheet of paper :roll:

Maybe you could add a stock or something to turn it into a true miniature piece of art.


The artist in me has long since died, function over form FTW! In that sense, it's not worth fiddling with something that will do more damage to the target if I drop it on it :)
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Unread postAuthor: deathbyDWV » Sat Feb 27, 2010 2:14 pm

Holy crap!!! That is amazing. Very impressive JSR...
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Unread postAuthor: maverik94 » Sat Feb 27, 2010 2:43 pm

After this recent challenge I couldn't help but rise to the task of making the smallest possible (within reason) co-axial.

Haha, JSR, I had a feeling this was going to happen :D Anyway, even though the power sucks, it's still a cool novelty item!
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Unread postAuthor: jackssmirkingrevenge » Sat Feb 27, 2010 3:31 pm

maverik94 wrote:Haha, JSR, I had a feeling this was going to happen :D


It was inevitable I would push the boundaries eventually :) added some more videos to the original post.
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Unread postAuthor: Brian the brain » Sat Feb 27, 2010 3:39 pm

I was kinda hoping you would take to the pico-ax suggestion as you did to the rattlesnake thing.... :D
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Gun Freak wrote:
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: jackssmirkingrevenge » Sat Feb 27, 2010 3:43 pm

hehe point taken :)
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Unread postAuthor: Brian the brain » Sat Feb 27, 2010 3:56 pm

Thanks buddy.

The thing is..I have only one mind...as far as we know.

I do the same thing with words as I do with fittings.. :D
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Gun Freak wrote:
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: jeepkahn » Sat Feb 27, 2010 5:45 pm

JSR - always keen to show that he's not compensating for anything


He's just working in scales that are familiar to him... :D
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Unread postAuthor: inonickname » Sat Feb 27, 2010 6:29 pm

Could be mighty inconspicuous if the rubber was left in place, but that's still so cool.

Seen as I have machining facilities I should make some mini schraders and distribute them among the crazies here.
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