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1/4 vs 1/8 in Copper Parts and Fittings

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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1/4 vs 1/8 in Copper Parts and Fittings

Unread postAuthor: Binary Blue » Sat Dec 29, 2012 2:37 am

Are there any advantages to using 1/4 inch pipes and fittings vs 1/8 inch pipes and fittings?

I'd like to keep the size of my cannon down to a minimum (weight, cosmetic reasons).

I plan to use as the main valve system a QEV and slide valve. I plan on firing airsoft BB's and .177 pellets.

Also, on Grainger's website, I noticed that there are some 1/8 inch pipe fittings available but no 1/8 inch pipes, only this coil:
http://www.grainger.com/Grainger/MUELLE ... Coil-2LKJ9
that looks like refrigeration tubing.

Image

Will this work with the 1/8 inch fittings they've listed?
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Re: 1/4 vs 1/8 in Copper Parts and Fittings

Unread postAuthor: PaperNinja » Sat Dec 29, 2012 8:23 am

Binary Blue wrote:Are there any advantages to using 1/4 inch pipes and fittings vs 1/8 inch pipes and fittings??


more flow + more chamber volume = more power, though larger pipes tend to either be much heavier, or have a lower pressure rating.
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Unread postAuthor: Binary Blue » Sat Dec 29, 2012 4:40 pm

Thanks for the info. Any chance that the 1/8 inch tubing I pictured above will work with 1/8 inch fittings like this:

http://www.grainger.com/Grainger/NIBCO-Elbow-5P048
?
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Unread postAuthor: PaperNinja » Sat Dec 29, 2012 5:48 pm

To be honest, I don't know. It probably would work, but if you go on mcmaster.com they'll have all the copper pipes and fittings you could want.
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