Quote:
Originally Posted by snotsdelta
This is great info. Thank you! Do you know of any websites that would be good to order from for the tank?
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Tanks of this type are fairly easy to find on automotive supply websites or Amazon (they're typically used for air horns and other such things). I found
this site with a quick search but you'll probably want to search around a bit to see if you can find a tank with the large ports but without a huge capacity (it has to be small enough to be portable after all).
On the note of using PVC, generally speaking I agree that PVC should be avoided, especially for the accumulator (air storage), but to be honest there is far less pressure involved for a much shorter amount of time when using PVC for the barrel of a cannon. IMO if you're really that concerned about it, and can't get a suitable pressure-rated metal tube, build a small polycarbonate (or whatever) box around the bottom half of the barrel to catch shrapnel in the event of a failure. Lots of teams have built PVC t-shirt cannons and no one has died yet (that we know of).