Sorry, I guess I do not make sense sometimes. What I meant was- would you ignite a combustion cannon with multiple electrodes (screws close enough together for a spark to jump the gap) or would you use a spark strip. Also I should have added that I plan on putting in 5 spark gaps.

I wanted to know if it is just opinion or if one is superior (series circuit or spark gap ignition).

I may just not get it but I do not see how "(One spark gap per chamber diameter) minus 1" works? Do you mean one spark gap per 4" of chamber minus 1? By the way I have not purchased a stun gun yet, so what voltage would you recommend.

Thank you for the info. I probably should have mentioned this but the chamber is 24 inches of 4 inch pipe. How many spark gaps would you recommend.

I am going to put a ignition with three spark gaps, and was wondering if a 100 kv stun gun would be enough. Also i already have a piezoelectric ignitor and I did not think that it would be enough, but if you think other wise just say so.

This is probably a dumb question, but what is a burst disk? How long can i make a 1.5" barrel? And i was wondering if i could make two sparks with one of those spark plug looking Bbq lighters?

What do you mean by "1x" propane shots? would it be stable for me to put a pair of screws on either end to make two sparks?

Thank you for the tip, the barrel is removable so i can install a 1.5" barrel. Is it even a remove fear that a pvc sch-40 gun could blow from a propane ignition? What are your longest distance with an advanced combustion gun what features did it have, what ammo, and fuel where you using? Sorry if I ...

I made a cannon the other day: Barrel: 2" diameter 48" long (volume: 150.80) Chamber: 4" 18" long (volume: 226.19) C:B ratio is 1.5:1 I shot it and then walked out the distance (107 yards) I am using right guard as the fuel It is made of pvc sch-40 pipe, can it hold up to propane (i heard it was a b...