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From: "David Carter" <dcarter11@sbcglobal.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-1350912@logan.com>
Subject: Re: [FlyRotary] Re: Exhaust systems (ceramic shield/manifold issues)
Date: Sun, 27 Aug 2006 10:45:22 -0600
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(lots of Google hits on both Fiberfrax and, without the "r", Fiberfax - see 
www.fiberfrax.com)

I think the selection of where (or if) to use Fiberf(r)ax surely should be 
informed by Ed's experience of oil absorption.
. . . The lower firewall is the RV-6 cowling "exit" area and so is in the 
"mainstream" of air flow around the engine and out the bottom.

However, higher up and forward, in vicinity of the exhaust headers and some 
parts of the exh pipes, there may be less "oily air".

Further, there are versions of this woven ceramic blanket that are covered 
by very thin stainless steel foil - used in the boiler and chemical plant 
environment.  Thus, the thin stainless covering would protect 99% of the 
blanket, then one could seal the edges with red liquid stuff used with 
"Firesleeve".  That should minimize the "oil absorption" problem - to the 
extent it might just be an "annual condition inspection" item, with 
replacement every 5 years or so, or, "as necessary".

David Carter

----- Original Message ----- 
From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, August 27, 2006 7:57 AM
Subject: [FlyRotary] Re: Exhaust systems (ceramic shield/manifold issues)


<snip>
>>Hi Charlie,
>
> I tried Fiberfax and while it shielded just fine, it easily absorbed oil, 
> grease, etc.  I had it protecting the bottom of my cowl and I finally 
> decided that it presented a fire hazard and removed it.  Just my 
> experience for what its worth.
>
> Ed
>
> Ed Anderson <snip>