All content on this page is for informational purposes only, I do not recommend building any device shown here and am not responsible for anything you may do with such a device. Please do not email me asking how to build potato guns, there are plenty of websites which provide step by step instructions, this page is meant only to show some of my designs, which can easily be reproduced if you know what you’re doing.
However, I would like to say that propane works pretty well as a fuel, if mixed properly with air and supplied with a decent igniton source.
A few of my previous spudgun designs:
Saveitforparts 
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