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Pictures of my potato gun finally finished and tested.

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Pictures of my potato gun finally finished and tested.

Unread postAuthor: Jeeperforlife » Wed Oct 31, 2012 9:11 pm

Hello again,

I have been out of the hobby for awhile now with a new hobby taking most of my time. but I blew the cobwebs off the old potato gun and I wanted to finally show you all now that it is done. I really don't remember all of the specs right off hand but if anybody has questions I will remeasure it if needed. but the pictures should answer most of the questions.
Also included is a foot long dart I welded up for it.
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Marcus
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Unread postAuthor: ramses » Wed Oct 31, 2012 10:04 pm

That is a most excellent barrel support
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Unread postAuthor: Technician1002 » Wed Oct 31, 2012 10:06 pm

Nice build. A smaller lighter piston can be used for faster operation. I presume the small chamber parallel to the main chamber is used for seating the piston. I used a barrel plug to temporally block the barrel to pre charge the chamber to about 5 PSI. When the plug is removed, that set the piston seal. That style is difficult to get to make the initial seal so it can be filled with air, especially if charged into the chamber instead of the pilot. My barrel centering supports were placed further from the breech of the barrel to reduce turbulence in this critical flow area.
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Last edited by Technician1002 on Wed Oct 31, 2012 10:14 pm, edited 2 times in total.
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Unread postAuthor: Gippeto » Wed Oct 31, 2012 10:09 pm

Like the folding stand. 8)

Why the small chamber? Having trouble getting an initial seal?

Bonus points for keeping the screws away from the edge. :)
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Unread postAuthor: jackssmirkingrevenge » Thu Nov 01, 2012 1:12 am

Gippeto wrote:Why the small chamber? Having trouble getting an initial seal?


First thought that crossed my mind.

So, about that dart... have you fired it yet, if so, DAMAGE PICS!!!

What sort of sabot did you/are you planning to use?
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Unread postAuthor: Jeeperforlife » Fri Nov 02, 2012 6:07 pm

Sorry it took so long to get back. I have been really busy at work.

Yes the small chamber is there to help with the chamber seal. Sadly however I never had used the dart, I'm saving it for when I have a better target.

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Unread postAuthor: AircannonSweden » Fri Nov 02, 2012 7:27 pm

What is the stand made of? PVC pipe? :)
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Unread postAuthor: Jeeperforlife » Sat Nov 03, 2012 10:46 pm

yes, the the stand is made of pvc and a couple of steel plumbing pieces.
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Unread postAuthor: mattyzip77 » Mon Nov 05, 2012 8:17 am

Very creative build. That piston is massive!!! That thing must really pack a whallop!!!
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Unread postAuthor: SkillessNoob » Mon Nov 05, 2012 11:35 am

This thing looks so epic lol. How bad-ass does it make you feel when you shoot it? :P
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