Jerry Hey wrote:

Paul,
Is there a  good source for  Iconel sheet.  I am thinking of
fabricating some rectangular bends and straight sections that could be
combined to build an exhaust system.   What do  you think an ideal
section would look like, dimensions and wall thickness?    Jerry

Boeing surplus had some a year or so ago. So did Pratt and Whitney
in Connecticut.

You probably need square with the equivalent area of a 2 inch diameter tube. 
Say 1.75 by 1.75. What the heck 2 by 2.

With Inconel you might get away with .035. I feel a bit uncomfortably 
with that so .040 would probably be my choice for Inconel.

IMHO the weight savings would not be worth the additional cost it over .065 321.

Paul Lamar
 
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