Re: Piezo Ignitor
Don't use a grill igniter... they are not very reliable. Trust me on this one. I just finished my fourth potato cannon setup: interchangeable barrels, muzzle breaks that throw flame, and a FLINT ingnitor. the first three I built used electronic ignition and were not nearly as reliable, they had maybe a 1 in 5launch rate, where as the flint one is good for 19 out of 20 launches. Plus they're alot cheaper.
The only, and I mean ONLY, benefit of electronic ignition is the ability to have multiple ignition points. I had a 9ft cannon (3 foot long, 4" combustion chamber, 6 foot long 2" barrel) that I wired two ignition points into, it was amazing when it worked, threw a caulking tube over a quarter mile, but it did not fire reliably.
My new one, being so much more relaible, is alot more fun. It also uses propae as a fuel. Propane is good because it's much cleaner, both for your gun and the enviroment, and cheaper, since all your money is buying fuel and not hair chemicals and advertising.
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Theory is a nice place, I'd like to go there one day, I hear everything works there.
Maturity is knowing you were an idiot, common sense is trying to not be an idiot, wisdom is knowing that you will still be an idiot.
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