SpudFiles

i love potato cannons,
i want to make one that is going to last a long time and impress guests.
i wanted to make one that used propane that i could attach mapp gas to the hose.
however when researching this i learned that for a mapp gas and oxygen mixed makes to much pressure and heat so it would need to be made of metal
is this true? if so has anyone made a guide on how to weld a metal potato cannon and inject mapp gas into it
i am unsure. what i wanted to replicate was this: but don't want it to blow up in my face

One is generally well advised not to mess with oxygen.

If you do, PVC construction is not a good idea, as the potential pressure generated increases proportionally to the amount of oxygen available.

Consider using a syringe to meter your fuel for good and consistent performance, rather than guesswork and hoping for the best.

nice job, also is there anything that i can do to help