SpudFiles

So... why is it more dangerous to use propane as fuel, by the way?
They use it all the time in movies because it doesnt stick to stuff like gasoline/napalm.

So this is the design I've settled on. A simple, compact canister. It uses a union to open and close, and one section of the union is plugged and tapped with a guage and a schrader.

I know the chances of it are slim, but I wanted to make sure that when the alcohol runs out, the propane doesn't escape and increase the risk of back up.

I will have a ball floating in the alcohol. When the alcohol is used up, it simply plugs an opening so that the propane stays inside.