"Larry Jaques" wrote in message
...
On Thu, 24 Mar 2011 19:07:21 -0600, F. George McDuffee
wrote:

crush bending - A non-mandrel method of bending in which the
compression of the intrados is controlled by stretching it
over a "crush knob" seated in the cavity of the bend die.
This eliminates the wrinkling or buckling that might occur
if the tube were bend without a mandrel. Commonly used on
non-round tube bends.

Yeah, that's the style I was suggesting. I didn't know the
terminology.


--
Make up your mind to act decidedly and take the consequences.
No good is ever done in this world by hesitation.
-- Thomas H. Huxley

The sample is crush bent. I'll be collating all the info I've been
gathering and canvass local fabricators. There used to be hundreds of
little shops in Cleveland that could do this, I'll be lucky to find
six.