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So after less than three hours, it's time for a test! The badboy fired right up, and started producing copious heat...
but not really all that great heat. I played with the gas pressure, to little effect, and then started playing with throttling
the burner, simply by placing my hand over the air intake. Blocking a big portion of my apparently-way-oversize
inlet bell made a huge and immediate difference in the apparent burn temperature.

The quickie fix, as you can see, was a few strips of masking tape to choke the inlet a tad.
I probably blocked 2/3rds of the inlet before it started to "sputter", and by that point, the
forge was yellow-hot and the test bars were ready to whang on.

Also note the bits of scrap tacked to the front as a rest for long bars.

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All text, photos and graphics Copyright 2008, 2009, 2010, 2011 Doc's Machine & Airsmith Services. All Rights Reserved.
Information contained in these pages is for reference and entertainment purposes only.  Our methods are not always the best,
quickest, safest, or even the correct ones. It's up to you to know how to use your own machines and tools.
Keep your fingers away from the spinny blades o' death and you should be all right.