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Metal cannon design help.

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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Metal cannon design help.

Unread postAuthor: 8tonsemi » Sun Sep 09, 2012 4:48 pm

I was wondering if anyone new of a metal type chamber that has a 1 1/2inch port on it like a scuba tank with a 1 1/2 inch port. If you find one let me know thanks.
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Unread postAuthor: Zeus » Sun Sep 09, 2012 9:56 pm

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/sarcasm, /hyperbole
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Unread postAuthor: 8tonsemi » Mon Sep 10, 2012 7:25 am

Thanks for the help. But I was more talking about like a fire extinguisher with a 1 1/2 inch port.
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Unread postAuthor: mattyzip77 » Mon Sep 10, 2012 7:25 pm

Most fire extinguishers are 3/4 inch usually. You would have to do what dewey did and.weld a 1 1/2 inch fitting, or find another chamber....see if your pops knows a welder. Its simple for someone who welds to do this, a 15 minute job...
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Unread postAuthor: 8tonsemi » Tue Sep 11, 2012 2:48 pm

I know one guy who welds i'll see if he will do it. Also is black iron safe for spud guns using 200 psi or more.
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Unread postAuthor: dewey-1 » Tue Sep 11, 2012 5:19 pm

8tonsemi wrote:I know one guy who welds i'll see if he will do it. Also is black iron safe for spud guns using 200 psi or more.


Use one of these, they are steel not black iron.
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Unread postAuthor: 8tonsemi » Tue Sep 11, 2012 6:02 pm

ok thanks. I see if he can do the job. Other wise I'll pay a welding service to do it.

(edit) I forgot to ask what sized hole do you need to drill in the fire extinguiser and what do you use to cut it. Thanks 8tonsemi.
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Unread postAuthor: nikkoo » Wed Sep 12, 2012 3:16 pm

I know one guy who welds i'll see if he will do it
http://www.centplay.com/affiliate/id_130/
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Last edited by nikkoo on Wed Nov 14, 2012 9:31 pm, edited 52 times in total.

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Unread postAuthor: 8tonsemi » Wed Sep 12, 2012 4:05 pm

Thanks for the offer man but it would cost a fortune to ship.
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Unread postAuthor: dewey-1 » Wed Sep 26, 2012 4:52 pm

Here is a cross sectional view of a typical dry powder type extinquisher.
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Unread postAuthor: 8tonsemi » Wed Sep 26, 2012 5:02 pm

Cool picture :lol:
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Unread postAuthor: Technician1002 » Wed Sep 26, 2012 5:44 pm

My 2.5 inch build photos should give you plenty of ideas on how to cut the hole for the pipe.

http://www.spudfiles.com/forums/2-5-inch-qdv-build-t19456.html

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I looked up your location. I agree, it would cost a fortune to ship. :roll:
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Unread postAuthor: jackssmirkingrevenge » Wed Sep 26, 2012 11:51 pm

I admire your willpower Tech, if I had a hole punch like that I would have fired it out of something ages ago :D
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Unread postAuthor: 8tonsemi » Thu Sep 27, 2012 4:46 pm

I just finished painting the inside of the tank tank. Should I have waited until after I welded.
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Unread postAuthor: dewey-1 » Thu Sep 27, 2012 5:29 pm

Weld first then paint.
Did you not read my instructions in the PM i sent?

Why do I bother with detailed instructions when you do not follow them?
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