I have been building skeletal dragon forms whenever steel and time are available. It seems obvious that the next thing to do is to make a life-size dragon head that is capable of spewing a jet of flame.
And, while I am at it, why not mount it on the roof of my ‘89 Honda Accord? I was recently gifted the Accord by a generous member of the Boston Burning Man group. All it needed was a new alternator to fix an internal short and of course a new dragon-head for the roof.
In researching the design for the flame cannon, I came across this well documented design for a homemade flame thrower posted in a number of places (but best laid out here) by Builderati, RolandTower.





My own design will use liquid propane (just like your grill uses) as a fuel source and produce more of a gush of flame like a flame cannon rather than a steady stream like flame thrower. I have done the trip to Lowes for the necessary plumbing fittings and I need the time to buy, assemble, and test. I have been delaying since I have a clearing in the woods in mind for a test spot rather than my backyard and I don’t want to be in the position of holding a flame cannon without the ability to immediately (and safely) test it out.