Straying pretty far off topic here, but I bet someone here has the answer..=
..

I am trying to get into neon tube bending for a gift I would like to
make for next Christmas.  To do it right will take at a minimum a
cross fire burner and a ribbon burner.  But these are hard to come by
used, since the peak years of neon shops going out of business is
past, and they are quite expensive new.

So I have started to work on making my own torches out of steel tubing
and brass fittings.  But I am having trouble with designing the torch
nozzles themselves.  A simple propane torch just has a tiny aperture
behind an air intake leading into the nozzle.  But the actual neon
tube torches seem to have very elaborate nozzles with lots of
apertures at the end in various configurations, the whys and
wherefores of which I do not understand.  (See for example,
http://www.sfsupplies.com/default.sfs?productid=3D5370)

A google search has not turned up any good references on the design of
torch nozzles.  Do any of you happen to know of any?

Thanks,
Eric
--=20
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