On Fri, 24 Mar 2006 03:21:00 -0600, Richard J Kinch
wrote:

It's all about BTUs.

Not all of it. You need temperature too.

"Weed burner" burners are cheap and commonplace and they make _lots_ of
BTUs. However the flame is too big and the temperature too low to be a
great deal of use for metalworking.