8 The Venturi Burner
Concentrated heat sources are one of humankind’s first tools. Makers of yesteryear considered casting, forging, soldering (old-school style), and hammer-welding metal key skills. Adding a high heat source to your toolkit opens up a wide range of opportunities. While charcoal and waste oil are great options for generating heat, propane stands out as a convenient, clean, easily controllable fuel. There are limits: without effort it’s difficult to get a propane-fueled forge or foundry above 1500°–1600° F (about 800°–900° C), but that still makes melting aluminum or heating iron to a bright cherry red no problem.
The amateur ...
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