Mailing List flyrotary@lancaironline.net Message #28585
From: Russell Duffy <13brv3@bellsouth.net>
Subject: RE: [FlyRotary] Heat exchangers
Date: Mon, 19 Dec 2005 13:06:45 -0600
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message
Here is a picture of the Ford fitting attach area. Note the strap to hold the stack together. Also not the 1/8 thick plate that the fitting is attached to. Looks like this may have been a fix for a design problem with the other cores.  
 
Hi Monty,
 
I wonder about the wisdom of trying to restrain the cores from being able to expand. I installed a radiator that came with dire warnings against rigidly mounting it.  They said it had to be allowed to expand and contract with temp changes, and if you mounted it rigidly, it would fail in short order.  
 
I realize the strap in the photo is stock, and perhaps if you keep the same type material (aluminum, steel, etc), and subject it to the same temps, then it will expand and contract along with the core.  I just don't think it would be wise to try to beef up a core, without knowing what new stresses it might cause. 
 
Cheers,
Rusty
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