Greeting Gentlemen,

My experience with Fiberfrax started in1989 with the completion of my
Varieze.  The then newly introduced material was to be installed on the EZ
firewall sealed behind a sheild of .020 aluminium.  This combination was
intended to replace the then standard stainless steel firewall.  The
Fiberfrax / aluminium combo was much lighter.  After ten years of flying,
experince showed that the material needed, indeed, to be protected from oil
absorbtion and could not sustain direct contact with a flame or very hot
surfaces like exhaust pipes.  (I tested some scraps to determine this).  It
would fall apart.  If it was protected from direct contact then it performed
fairly well.  Oil tended to creep in from the edges of the firewall.  This
area and any firewall penetrations were sealed up with high temp RTV.  This
worked well.

Ken Mintz



----- Original Message -----
From: "Ernest Christley" <echristley@nc.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, August 16, 2003 10:16 PM
Subject: [FlyRotary] Re: Fiberfrax?


> Russell Duffy wrote:
> >
> > Any experience with this Fiberfrax stuff?
> >
>
> The stuff I got from Aircraft Spruce is great... as long as you don't
> heat it up.
>
> I used it on several weld joints to slow the cooling.  I made a cup of
> cardboard with the Fiberfrax coating the inside.  If I tried to use it
> to blanket the weld directly, it would start smoking, turn grey, and
> immediately become even more delicate than it how it started.  It would
> literally fall apart in your hand.
>
> My sense of it is that Fiberfrax needs to be constrained to areas where
> it can be completely supported on both sides.
>
>
> --
> ----Because I can----
> http://www.ernest.isa-geek.org/
> ------------------------
>
>
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