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steel pen gun

Discuss miniature cannons built from things such as pill bottles and pen caps.
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steel pen gun

Unread postAuthor: to_live » Sun Oct 26, 2008 9:33 pm

This is my first attempt at a barrel sealing piston or any sort of piston for that matter. I am using a bb as a piston not to sure yet whether it will work? The body of the pen gun is made from 6.3mm id steel the wall thickness is roughly 1.5mm, and the barrel is made from an old pellet gun barrel rouhgly 3.5mm, I am using a shrader to fill the pen gun and as the trigger. Nothing has been glued yet I am waiting to go down the street to get some araldite. Any suggestions?
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Attachments
P1000022.JPG
the internals
P1000022.JPG (31.95 KiB) Viewed 381 times
P1000023.JPG
what it will look like once i have glued it all together.
P1000023.JPG (30.63 KiB) Viewed 381 times

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Unread postAuthor: jook13 » Sun Oct 26, 2008 9:43 pm

Its looking pretty sweet so far. let us know how it works when all is said and done. or better yet, get some video of it working...
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Unread postAuthor: jor2daje » Sun Oct 26, 2008 10:49 pm

Have you got anything to help make a good seal between the barrel and the airsoft bb. Other than that looks pretty cool.
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Unread postAuthor: to_live » Sun Oct 26, 2008 11:37 pm

i am going to put a piece of neoprene between the bb and the barrel didnt cut it yet because i would probably lose it.
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Re: steel pen gun

Unread postAuthor: jackssmirkingrevenge » Mon Oct 27, 2008 12:49 am

to_live wrote:the barrel is made from an old pellet gun barrel roughly 3.5mm


What sort of pellet gun is that then?

The gap between the BB and the chamber wall is relatively small but not insignificant, make sure you keep your pilot volume tiny.
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Unread postAuthor: to_live » Mon Oct 27, 2008 4:32 am

the pellet gun was just a cheap one from a $2 shop before they were banned (i live in australia) i hadnt thought about the pilot volume but thanks i will keep that in mind.
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