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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: jackssmirkingrevenge » Fri Nov 06, 2009 10:38 pm

CpTn_lAw wrote:Edit : It does work, but....what a poor performance!!!! it isn't even loud!! XD


You must have a parameter wrong somewhere.

A high price means that people won't just buy it as a toy, but have to be really interested in the subject. (OR they are planning to do harm with it and need it for bad purposes)


All fair points, perhaps I need an agent who will find me the right clients :D
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Unread postAuthor: nath64 » Mon Nov 23, 2009 11:57 pm

cool now i want to make one, but i don't understand the how-too, i know i am a noob :cry:
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Unread postAuthor: jackssmirkingrevenge » Tue Nov 24, 2009 12:03 am

It really is very simple, and if you have a look at my second variant the piston is a simple chunk of thick rubber making it even easier to build.

If you still don't get how to make it then you probably shouldn't be playing around with compressed air to begin with ;)
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Unread postAuthor: inonickname » Tue Nov 24, 2009 5:48 am

If you're having trouble understanding the function of it, read this.

It's just a co-axial piston valve on a very small scale. The schrader valve allows pressurization and triggering.
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Unread postAuthor: nath64 » Tue Nov 24, 2009 8:49 am

how do you pressurize such a small thing?
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Unread postAuthor: jackssmirkingrevenge » Tue Nov 24, 2009 8:55 am

nath64 wrote:how do you pressurize such a small thing?


Image

I know it's a long thread but if you bother reading through it I'm sure most of your questions will be answered.
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Unread postAuthor: sparktech » Fri Feb 25, 2011 6:52 pm

for all the guys asking about an air source (myself included) couldn't we just use a CO2 tank?? like one of the awesome gadgets that my bike store has is a CO2 tire re-filler and its basically a threaded refillable CO2 tank that you put on this special valve that is included.
if anyone has some insight on that it would be much appreciated!!!
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Unread postAuthor: Crna Legija » Fri Feb 25, 2011 8:34 pm

that will dump 800psi+ into you pen gun, do you think its safe.
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Unread postAuthor: jackssmirkingrevenge » Sat Feb 26, 2011 12:13 am

-_- wrote:that will dump 800psi+ into you pen gun, do you think its safe.


Actually for a well built pen gun, it's not as dangerous as it sounds.

I tried filling this one using my ultraflate and it didn't explode, I got at least 50 good refills from one 12 gram CO<sub>2</sub> capsule then stopped counting.
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Unread postAuthor: sparktech » Sat Feb 26, 2011 12:15 am

haha...i had no clue they were pressurized at such a high pressure...not safe but then again what is safe that's fun?? :D
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Unread postAuthor: jackssmirkingrevenge » Sat Feb 26, 2011 12:30 am

sparktech wrote:haha...I had no clue they were pressurized at such a high pressure


If you're filling a tyre, it's a relatively large volume so you don't really notice the high pressure that the source, but pen gun chambers are tiny in comparison so they get the full pressure the inflator is putting out.

...not safe but then again what is safe that's fun?? :D


Actually, if your pen gun is well built, it's perfectly safe. I do however agree, as my idol Lady Gaga sings, "if it's not rough, it isn't fun."

Sorry, Winamp just decided to play Cartman's rendition of Poker Face :roll: :D

Edit: I really can't put how it works any clearer:
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Unread postAuthor: Crna Legija » Sat Feb 26, 2011 5:06 am

yea it was more of a info thing just making sure he knows how much pressure hes playing with. especially with co2 because it can get well passed 1000psi
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Unread postAuthor: sparktech » Sat Feb 26, 2011 2:02 pm

thanks for the info!!
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Unread postAuthor: jakethebeast » Sat Feb 26, 2011 4:01 pm

sparktech, be sure to play safe. some safe thigs are fun :D . when dealing with unregged co2, it has to bu just, no almost. we dont want that another spudfiles member dies :(
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Unread postAuthor: sparktech » Sun Feb 27, 2011 5:32 pm

jakethebeast, you said its fairly dangerous with unregulated co2, what if i used this:
[url]http://www.strykeairsoft.com/shop/index.php?main_page=product_info&cPath=25_54&products_id=508
[/url]
?
Thanks for all the feedback on this!
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