Mailing List flyrotary@lancaironline.net Message #33021
From: george lendich <lendich@optusnet.com.au>
Subject: Re: [FlyRotary] Stainless 321 Tubing
Date: Thu, 3 Aug 2006 08:38:09 +1000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
: [FlyRotary] Stainless 321 Tubing


I'm having a heck of a time finding 321 Stainless mandrel bends in
anything
larger than .049 wall. I'm trying to get 4 - 4" Center Line Radius, 90deg
bends in at least .065" wall. I've tried calling 4 places and researching
a
hundred others online and my last hope appears to be Woolf Aircraft
Products
(http://www.woolfaircraft.com/).

Is .049" wall beefy enough? If I recall, it seems that most people are
using
material that is larger.  RacingBeat/MazdaTrix sell .125" wall but only in
"mild steel" not stainless.

Anyone else have any suggestions?

Joe Hull
Cozy Mk-IV N31CZ (65 hrs - Rotary 13B NA)
Redmond (Seattle), Washington

Joe,
I'm using off-the-shelf cones for exhaust parts which are a mixture of 304
and 316 and are usually 1.6mm as a standard.

I know 321 has better resistance to heat and that .049 ( 1.25mm) is fine for
321. I also feel that 1.6 is also fine for 304 and 316.

I would only use mild steel if I expected to change it regularily.
George (down under)

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