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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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Re: pen-gun questions

Unread postAuthor: jackssmirkingrevenge » Fri Mar 13, 2009 1:05 am

xkidxhavocx wrote:what did you use as darts?


Nails with a wrapped tape tail

whats a breech seal?


Do some more research, this site is full of useful information

how far does it shoot?


Miles! But you can't really aim it, so it's strictly for across-the-room use only.

and how much did it all cost?


Less than 20 of your finest American dollars

MrCrowley: Edited for content (shooting animals)


No, please don't use it shoot animals.
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Unread postAuthor: poppamies » Tue Mar 17, 2009 4:15 pm

can you make a video how to make this awesome pengun?
how the hell does it shoot and do the piston let air throw to the body but not to the barrel?
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Unread postAuthor: jackssmirkingrevenge » Wed Mar 18, 2009 1:09 am

poppamies wrote:can you make a video how to make this awesome pengun?


No, I've already explained it well enough ad nauseum, if you can't make it from the current instructions then you're probably not responsible enough to use it properly. Still, if you have any specific questions other than asking for step-by-step building instructions, feel free to ask.

hasn't done his research wrote:how the hell does it shoot and do the piston let air throw to the body but not to the barrel?


Piston valves explained visually
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Unread postAuthor: poppamies » Wed Mar 18, 2009 4:33 pm

can you send more pics from the piston?
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Unread postAuthor: MrCrowley » Wed Mar 18, 2009 10:16 pm

poppamies wrote:can you send more pics from the piston?

What more do you need?
Image

It's a piece of metal and a BB...can you not comprehend that? A piston can be made from anything, nothing has to be made to exact specifications, so use your head, that i'm pretty sure you were born with, and just experiment with anything that you would think would make a suitable piston.

If you can't think of anything to use for a piston, you obviously don't know enough to start building a piston. Go to Home Depot, and I guarantee you there will be 10,000 things you could make a piston from.

Go do some more research.
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Unread postAuthor: jackssmirkingrevenge » Fri Mar 20, 2009 12:02 pm

The piston can more easily be cut out of thick solid rubber like so:

Image
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Unread postAuthor: poppamies » Sun Mar 22, 2009 1:29 pm

thanks from the last picture. i made my own from that and it shoots with 600psi thru the deodorant can and it shoot airgun pellets (.177).
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Unread postAuthor: jackssmirkingrevenge » Sun Mar 22, 2009 1:33 pm

poppamies wrote:thanks from the last picture. i made my own from that and it shoots with 600psi thru the deodorant can and it shoot airgun pellets (.177).


pictures please :)
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Unread postAuthor: poppamies » Mon Mar 23, 2009 10:24 am

i sen dphotos soon until i get my camera from the workshop
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Unread postAuthor: jackssmirkingrevenge » Mon Mar 23, 2009 12:32 pm

Also, what are you using to get to 600 psi?
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Unread postAuthor: poppamies » Mon Mar 23, 2009 2:36 pm

a high pressure air compressor that i mod to a schrader valve. the maxinium pressure of compressor is 300bar and i use it on my weihrauch hw 100k. the pengun airtank is full on about 2seconds
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Unread postAuthor: john bunsenburner » Mon Mar 23, 2009 2:39 pm

So it is a scuba tank compressor?
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Unread postAuthor: jackssmirkingrevenge » Mon Mar 23, 2009 2:42 pm

Interesting, would love to see photos of your charging setup too :)
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Unread postAuthor: john bunsenburner » Mon Mar 23, 2009 2:43 pm

maybe its jsut me but perhaps a 300bar compressor is not the safest was to fill a pengun, please show us that set up of yours.
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Unread postAuthor: poppamies » Mon Mar 23, 2009 3:46 pm

now i fill it with an paintball tank because my compressor broke just mayby 15min ago and now i use a 700psi and 1,8mm barrel. it shoot needles and solderin iron ( i`m going to send pics from the bullets and the pengun. my camera is still broken so you have to wait for mayby week
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