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I would recommend checking out spudfiles.com , it's pretty much a forum website specializing in spud cannons and a few other related things.or go to YouTube.com and type in "how to build a potato gun"
For your first simple potato gun:

You need a combustion chamber (1-2 foot of 3" PVC), a barrel (2 or more feet of 1.5" or 2" PVC), a reducer to connect these 2 pieces, a cleanout for the back of the combustion chamber ( a screw on cap and the part that connects this to the 3" pipe), and a grill ignitor. I like to drill the hole in the cap and put the ignitor here. You may need to fill in the hole around the igntor with something like JB weld. Use PVC solvent to assemble.

Of coarse potato guns can be dangerous and should not be made by anyone.

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11y ago

What else can I help you with?