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The Improved Pen Gun

Built a pneumatic 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: rcman50166 » Tue May 13, 2008 6:07 pm

lol The outer tube is a bit smallet than that of a regular pen tube. What you see there is evidence of me smashing the top in to fit the tube kinda like pvc and a potato, except harder. :lol:

EDIT: the video is now up. I slapped it together so it's not very good. :oops:
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Unread postAuthor: Sticky_Tape » Tue May 13, 2008 6:17 pm

You should use a shock pump. beat JSR to it :D :D :D :D
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You can tell how awesome a cannon is by the pressure used.
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Unread postAuthor: rcman50166 » Tue May 13, 2008 6:22 pm

Well I use this because it is the only pump i have that can attach to shrader valves. My friend is holding my 250PSI mini compressor at his house so I can't use that until the weekend. The mini pump is very concealable though...
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Unread postAuthor: Sticky_Tape » Tue May 13, 2008 6:31 pm

Maybe you could make a consealible shock pump?!
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You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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Unread postAuthor: rcman50166 » Tue May 13, 2008 6:43 pm

I was thinking about making such a pump. It would not be very easy. Creating those pressures requires a lot of force. I was thinking about making a 500PSIG stomp pump but then the bottom line came out to be too much, especially for a pen gun. It is also hard to make things seal at those pressures especially moving seals. That little piston in my pen gun took about 15 man hours to perfect.
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Unread postAuthor: rcman50166 » Tue May 13, 2008 7:25 pm

Here's an interesting thing. Compare my pen gun to JSR's. They are displayed in the same manner. I'll put them side by side to make it easy.

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Unread postAuthor: Lentamentalisk » Tue May 13, 2008 7:38 pm

Great job! it looks so clean and pretty!
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Unread postAuthor: STHORNE » Tue May 13, 2008 8:02 pm

I read and read and couldn't find the answer to my question.

How did you attach the schreader to the chamber? It's very clean and I can't see any solder points or welding marks...
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Unread postAuthor: OuchProgramme » Tue May 13, 2008 8:23 pm

I cant believe JSR hasn't posted in here yet ;).

An epic battle
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Unread postAuthor: STHORNE » Tue May 13, 2008 8:25 pm

no kidding. I'm guessing he's too pissed off that you showed him up to post lol.

I think he needs a stress ball

JSR = :angry5: lol
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Unread postAuthor: pizlo » Tue May 13, 2008 8:34 pm

Aye sticky, I do owe you an apology, I misunderstood your question. Sorry mate.
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Unread postAuthor: MrCrowley » Tue May 13, 2008 8:58 pm

STHORNE wrote:no kidding. I'm guessing he's too pissed off that you showed him up to post lol.

I think he needs a stress ball

JSR = :angry5: lol

I think he's still settling down in Spain or out with the chicas :D
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Unread postAuthor: ammosmoke » Tue May 13, 2008 9:09 pm

LOL!!! Good one. I think it looks great, but u might want to be more careful about dissing older members like JSR (even if it was subtle). Anyways, great gun. I like it.
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Unread postAuthor: jackssmirkingrevenge » Wed May 14, 2008 3:17 am

MrCrowley wrote:I think he's still settling down in Spain or out with the chicas :D


Right you are, had a hell of a long weekend :D

Very nicely done, I built my pen gun in a few days as a quick "must enter something in the contest" project and there was a lot of room for refinement, glad to see someone made the effort :)

As I always say in these cases though, small volume and calibre needs high pressure to be effective, I would definitely invest in a shock pump or similar ;)
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Unread postAuthor: SpudFarm » Wed May 14, 2008 7:00 am

nice little gun there rcman!

any chrony results? "no i have note read mere than the first page"
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