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Scott,
For an NA 13B I think 304 will work fine, 321 is somewhat better, but I
have 360 hours on my .101 wall (a bit thick wall) 304 and its still going
strong. My personal comfort zone (not based on data) would go for a minimum
of 0.058" wall if using 304, perhaps .049" for 321.
Ed
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message ----- From: "Scott" <squiggles@yahoo.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, May 03, 2004 1:54 PM
Subject: [FlyRotary] Exhausts: 304 vs 321
Hello All...
This has probably been discussed many times over, but
I can't seem to find an answer in the archives to the
following...
For a NA 6 port, 13b, why choose 321 stainless steel
over 304 for the exhaust? Or Inconel 625 over 321?
Is it a comfort level or a need? Also, it seemed that
321 .035 was living on the edge and that most were
using in the .060+ range. Is this the prevailing
wisdom?
Finally, is visually possible to determine what is 304
and what is 321?
I ask this as I am going over to a used parts race
shop and they just have a pile of exhaust pipe, no
rhyme or reason to the pile. Thus, if it really
didn't matter on the SS alloy I could just pick the
pipes I needed and hack and slash as necessary.
Thanx!!! Many thanks to all who posted pics of their
coils and water pump surgeries!!!!
-Scott
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