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Pneumatic Pen-gun Project

Built a miniature 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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Unread postAuthor: STHORNE » Sun Jan 20, 2008 12:22 pm

lol, thats perfectly disguised as a regular pen, nice job!

ever think about taking that to school and teaching some kids a few things about pain lol. jk.

so did you construct every piece yourself, or did you scavange them off of accuall pens?
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Unread postAuthor: jackssmirkingrevenge » Sun Jan 20, 2008 2:10 pm

sthorne wrote:so did you construct every piece yourself, or did you scavange them off of accuall pens?


No parts from an actual pen unless you cound the cap trigger, check out the how-to.
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Unread postAuthor: jon_89 » Mon Jan 21, 2008 10:25 pm

This may be a dumb question but how do you get your pump off with out letting the air vent behind the piston?
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Unread postAuthor: jackssmirkingrevenge » Mon Jan 21, 2008 11:57 pm

o-rinbg between the schrader ands the shock pump, which seals the connection butsn't allow the pin on the pump's female thread to physically open the swchrader's stem, meaning the schrader acts as a check valve and will be closed when the pump is removed.
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Unread postAuthor: jon_89 » Tue Jan 22, 2008 12:57 am

you know jack i kind of get it but i diagram would solve my stupidity.
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Unread postAuthor: FordGtMan » Tue Jan 22, 2008 1:01 am

Its okay, iv asked this many times and i still don't get it :?
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Unread postAuthor: Novacastrian » Tue Jan 22, 2008 1:02 am

Simple really, find an o'ring that is the same diameter as the valve (6mm), place this in the part that screws onto the valve.
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Unread postAuthor: FordGtMan » Tue Jan 22, 2008 1:09 am

:oops: JSRs colorful vocabulary confused me, even though im horrible on understanding things. (looks at geometry grade) :(
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Unread postAuthor: jackssmirkingrevenge » Tue Jan 22, 2008 1:10 am

Oh come on, it's really simple - you just need to put an o-ring or similar rubber seal between the schrader and the pump connector, in such a way that the connector's pin cannot physically touch the schrader stem.
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Unread postAuthor: Antonio » Tue Jan 29, 2008 2:33 pm

jackssmirkingrevenge wrote:
I routinely hit 1,000 fps with my 6mm coaxials.


Are you serious man! This thing went close to the speed of sound? Damn, alright 13atm is high but still.
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Last edited by Antonio on Tue Jan 29, 2008 2:52 pm, edited 1 time in total.
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Unread postAuthor: jackssmirkingrevenge » Tue Jan 29, 2008 2:38 pm

ant wrote:This thing went close to the speed of sounds?


Not this particular launcher, but I did just over 1,000 feet per second with a 6mm coaxial piston launcher, and my best results were with this burst disk pneumatic ;)
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Unread postAuthor: jackssmirkingrevenge » Sun Feb 03, 2008 11:59 pm

Oh come on, it's really simple - you just need to put an o-ring or similar rubber seal between the schrader and the pump connector, in such a way that the connector's pin cannot physically touch the schrader stem.


For those who still don't know what I'm talking about, it's this simple:
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Unread postAuthor: JDAX23 » Mon Feb 04, 2008 3:58 am

wow i really like that...good job jack. I like that fact that it can be disguised as a pen. I would definately get in trouble with that at school though lol :twisted: and speaking of school its 2 in the morning so i should go to bed lol goodnight all
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Unread postAuthor: airheadnoob » Sat Apr 05, 2008 2:26 am

woooooooooooooow i always wanted somtiong like this can you please explain how it works
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Unread postAuthor: Lentamentalisk » Sat Apr 05, 2008 2:38 am

um...........
read the posts?
he did explain...
you fill it up, then you press in the tyre valve, and it shoots.
try reading before you post, and if you already have read the posts and still cant figure it out, ask a more specific question.
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