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The worlds smallest advanced combustion spudgun
This is one of my micro spudguns. It has a 1/2" (pipe size, not actually that large) schedule 40 PVC chamber rated to several hundred psi. It has a fan to mix the fuel-air mixture before deflagration, and a 3 gap sparkstrip to create 6 flame fronts rather than two. It also ignites the fuel-air mixture more reliably.
Fuel (butane or propane) is metered from a small syringe and directly injected into the chamber. The barrel threads are 1/4" tapered NPT. There is a schrader (automotive valve) added for chamber clearing and hybridding. This cannon can also use a burst disk.
By the way, for those who do not know, an advanced combustion (spudgun) usually has: metered fuel injection, chamber fan, spark strip, breech loading (loads from back of barrel, not the front) and whatever other features. Not your normal spray 'n pray.
This is one of my micro spudguns. It has a 1/2" (pipe size, not actually that large) schedule 40 PVC chamber rated to several hundred psi. It has a fan to mix the fuel-air mixture before deflagration, and a 3 gap sparkstrip to create 6 flame fronts rather than two. It also ignites the fuel-air mixture more reliably.
Fuel (butane or propane) is metered from a small syringe and directly injected into the chamber. The barrel threads are 1/4" tapered NPT. There is a schrader (automotive valve) added for chamber clearing and hybridding. This cannon can also use a burst disk.
By the way, for those who do not know, an advanced combustion (spudgun) usually has: metered fuel injection, chamber fan, spark strip, breech loading (loads from back of barrel, not the front) and whatever other features. Not your normal spray 'n pray.
which I guess isn't bad, considering its functional.