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My first mini

Discuss miniature cannons built from things such as pill bottles and pen caps.
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My first mini

Unread postAuthor: PeteS » Tue Sep 24, 2013 11:45 am

I just wanted to comment on my first mini experience. I built a pen sized device out of tent pole Easton aluminum tubing. It is coaxial with a .5" OD chamber and a 27 caliber barrel. At first it had an aluminum piston with a rubber face, but the rubber was too soft. I then rebuilt it with a solid Teflon piston. It now works great at 300-400 psi from a bike shock pump. The fill valve and trigger is a Presta valve. For filling I use a Presta to Schrader adapter.

The parts were turned down on my lathe and assembled with epoxy.

I plan to make one that is more pen like maybe even with a working pen and also one that is longer and more weapon like. I plan to experiment with co2 charging using a bike tire co2 inflater as well.
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Last edited by PeteS on Tue Sep 24, 2013 1:57 pm, edited 1 time in total.
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Re: My first mini

Unread postAuthor: jackssmirkingrevenge » Tue Sep 24, 2013 1:27 pm

PeteS wrote:I think it might actually be powerful enough to ************, if I add a laser pointer so I can hit them. If not a longer version might




Other than that, photos and videos :)
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Re: My first mini

Unread postAuthor: PeteS » Tue Sep 24, 2013 1:58 pm

jackssmirkingrevenge wrote:
PeteS wrote:I think it might actually be powerful enough to ************, if I add a laser pointer so I can hit them. If not a longer version might




Other than that, photos and videos :)


Sorry. I removed the offending verbiage. I will takes some pics as soon as I get to it.
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Unread postAuthor: dart guy » Tue Sep 24, 2013 2:42 pm

You need pics if you want my attention.
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Unread postAuthor: PeteS » Tue Sep 24, 2013 2:46 pm

I just chrono'ed it at 250 fps at 300 psi.
Hopefully the following picture will post.
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Unread postAuthor: dart guy » Tue Sep 24, 2013 2:50 pm

now im happy, nice pen gun hope you can hit a target with it cuz id like to see it hit a can :wink:
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Unread postAuthor: PeteS » Wed Sep 25, 2013 9:41 am

Damage photos... Steel bean can entry and exit. Projectile was a 0.5" section of 0.25" stainless rod.
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Unread postAuthor: PeteS » Wed Sep 25, 2013 9:43 am

BTW: I am making it more streamlined and adding an actual pen cartridge and point that can be removed when using the gun. Also I made the breech end fit a sharpy cap. All in all it has been a fun project and a good way to get used to my lathe.
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Unread postAuthor: dart guy » Wed Sep 25, 2013 2:51 pm

Dude, i like your project now you can carry around a pen gun and whenever there is an evil can around you can make sure it is shot, and protect the squirrls :D (i hate squirrels :x)
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Unread postAuthor: jakethebeast » Wed Sep 25, 2013 3:46 pm

Dart guy, why do you hate squirrels? Nice little creatures that make the nature even more joyable place IMO

Nice pengun btw! Very clean looking :)
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Unread postAuthor: Talk » Wed Sep 25, 2013 5:22 pm

where's the Part in the pen gun where the compressed air gets accumulated to push the projectile out :?
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Unread postAuthor: PeteS » Wed Sep 25, 2013 5:42 pm

Talk wrote:where's the Part in the pen gun where the compressed air gets accumulated to push the projectile out :?


It is coaxial. The tube you see is the air chamber. The smaller diameter and barrel is inside it.

If you look at http://www.spudfiles.com/forums/piston- ... t8157.html it is like the coaxial one except the fill valve and exhaust valve are the same valve.
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Unread postAuthor: Talk » Wed Sep 25, 2013 6:17 pm

PeteS wrote:
Talk wrote:where's the Part in the pen gun where the compressed air gets accumulated to push the projectile out :?


It is coaxial. The tube you see is the air chamber. The smaller diameter and barrel is inside it.

If you look at http://www.spudfiles.com/forums/piston- ... t8157.html it is like the coaxial one except the fill valve and exhaust valve are the same valve.


why use too much lathe works when you can make some simple stuffs to have fun? :?

My First Mini was something like this ...
almost any kind of ammo was used
I used pomegranate pulp because that had an impact like paint balls
small stones, chewed paper, aluminium foil etc.
put the projectile inside ,stretch the balloon and *pop*

but yes it didn't have the power to Pierce metal cans :3
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Unread postAuthor: Gun Freak » Wed Sep 25, 2013 7:51 pm

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Unread postAuthor: PeteS » Thu Sep 26, 2013 5:53 am

Talk wrote:why use too much lathe works when you can make some simple stuffs to have fun? :?


Nothing wrong with simple, but for some of us the lathe work is a big part of the fun.
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