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pengun deluxe

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: clemsonguy1125 » Wed Jul 21, 2010 10:30 pm

Thanks, but what do you mean cap, is there a small brass cap in there, does the silicone tube help with sealing it?
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Unread postAuthor: jackssmirkingrevenge » Wed Jul 21, 2010 10:37 pm

The silicon tube is slipped over the (brass) barrel and inserted into the (aluminum) chamber, of course the actual pressure bearing seal in the chamber comes from the epoxy.

The silicone allows me to put on an actual pen cap to cover the barrel without having it fall off due to the tight fit.
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Unread postAuthor: clemsonguy1125 » Wed Jul 21, 2010 10:50 pm

Thanks I get it know, do any of your pens have a lower barrel support of is it not nessacery on minis
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Unread postAuthor: jackssmirkingrevenge » Wed Jul 21, 2010 10:53 pm

For relatively short minis, as long as the barrel is properly lined up it will not flex in use, even at high pressure, so no need for supports.
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Unread postAuthor: lemming124 » Fri Jul 23, 2010 9:31 am

nice job. I like the silicon tube at the end, looks better than a conventional cap.
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Unread postAuthor: jackssmirkingrevenge » Sat Jul 24, 2010 1:57 pm

Here's my latest pengun, it's designed to fit into an existing pen without modifying the casing. In this regard external dimensions are very similar to the ballpoint refill it will replace.

As I was constrained to 6mm maximum external diameter, I couldn't use an ordinary schrader valve. Instead of making my own, I figured it would be easier to take a schrader core and epoxy it directly into the chamber. Fits nicely, but now the issue is how to fill it. I've made a ghetto fill station which is basically a sealed tube in which the whole firing unit fits, we'll see how well it works after curing.
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Unread postAuthor: jakethebeast » Sat Jul 24, 2010 3:53 pm

hah that looks cool! i hav an idea for filling, the end of the chamber where is the shrader core, put the gun into a drill ja file it a little bit, then tap same screws trhat schrader has and fill it with normall shock pump?
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Unread postAuthor: jackssmirkingrevenge » Sat Jul 24, 2010 4:30 pm

That won't work, to have threads that match a schrader it won't fit in the pen casing. If I did I just would have stuck a schrader in there as usual :P
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Unread postAuthor: Lockednloaded » Sat Jul 24, 2010 4:58 pm

what about a compression fitting for filling?
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Unread postAuthor: Mr.Sandman » Sat Jul 24, 2010 6:33 pm

Why not thread the outside of the casing? If it is 6mm then it should fit pretty good into a schrader hose.
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Unread postAuthor: jackssmirkingrevenge » Tue Jul 27, 2010 1:06 pm

Finished the cap as a firing mechanism on the original subject of this thread, works great :D

[youtube]http://www.youtube.com/watch?v=aVrtyy6jmCY[/youtube]
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Unread postAuthor: Mr.Sandman » Tue Jul 27, 2010 1:15 pm

So you never did tell us, how did you manage to fill it? That trigger looks like it works flawlessly because judging from the video, it looks like you barely had to push on the cap to make it fire.
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Unread postAuthor: jackssmirkingrevenge » Tue Jul 27, 2010 1:18 pm

Mr.Sandman wrote:So you never did tell us, how did you manage to fill it?


This isn't the "parker" one, I've put that on hold for now.

That trigger looks like it works flawlessly because judging from the video, it looks like you barely had to push on the cap to make it fire.


Yep :)
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Unread postAuthor: Mr.Sandman » Tue Jul 27, 2010 1:26 pm

jackssmirkingrevenge wrote:
Mr.Sandman wrote:So you never did tell us, how did you manage to fill it?


This isn't the "parker" one, I've put that on hold for now.

That trigger looks like it works flawlessly because judging from the video, it looks like you barely had to push on the cap to make it fire.


Yep :)
Silly me, I do believe I have MPCS or Mass Pengun Confusion Syndrome. Just curious question if you dont mind me asking, how loud is this particular pengun? Even at low pressures of 450 psi, my pengun sounds like a firecracker and i'm thinking of making a detachable suppressor for it.
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Unread postAuthor: jackssmirkingrevenge » Tue Jul 27, 2010 1:32 pm

It's quite loud, but not excessively so, my HW45 is much louder.
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