That's interesting. That reminds me of a time back in 1993 (or so) I visitied this company (I can't remember the name) near Louisville, Kentucky, and at the time, were manufacturing torches, and developing a process that used hydrogen to fuel their torches. I remember they had a warehouse sized building with huge tanks and all sorts of things to draw out the hydrogen from water. The gentleman whom we (my welding teacher and I) spoke with, demonstrated how cool the torch stayed to the touch, and the flame, though small, was cabable of some rather extreme heat. Rather facinating really.

Jason

Hydrogen + oxygen has a flame temperature of 4,000f. Acetylene + oxygen has a flame temperature of 5,700f.

I just can't get that worked up over hydrogen/oxygen torches.