Tennis Ball Mortar

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
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JamesH
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Posts: 13
Joined: Wed Oct 22, 2008 6:46 pm

Sun Mar 29, 2009 10:57 pm

is it loud???
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