Gary;
Similar stuff has been used in the aerospace industry for quite a while in
aircraft & spacecraft. It seems to be very effective against fire while
adding little in the way of weight.
Perhaps one consideration in evaluating the effectiveness of a bare (metal)
firewall material is its cold & hot rupture strength. A material with high
cold rupture strength would offer protection against a grenaded engine while
its high hot rupture strength might be measure of how well it could
withstand a fire. I wonder if some firewall metals could be listed in a
table that lists their alloys and minimum thickness required and it might
make the rulebook someday?
I'm not complaining-- the job of rulemaking & scrutineering is tough enough
without nit- picking racers; these are just ideas that I'm bring up in the
spirit of being constructive.
Regards, Neil Tucson, AZ
-----Original Message-----
From: gary baker [mailto:lsr350@hotmail.com]
Sent: Tuesday, April 09, 2002 4:54 AM
To: Dave Dahlgren; James Tone; list
Subject: Re: Rulebook Firewall Question
dave
In the fire protection industry we have to provide fire ratings to many
types
of metals for up to four hours at 1500 deg F and we achieve this by several
methods , one of the newer methods is the use of special paints (
intumescent
paints and mastics) which are applied and act just like regular type paints
untill affected by heat they then expand many times there original thickness
filling all gaps and provide a thermal barrier blocking the spread of smoke
and flame and can provide up to 4 hours protection depending on the
substrate
, this type of protection could be used very successfully on any type of
fire
wall material greatly increasing its effectivness against fire , yes even
aluminium or wood or peanut butter, Im using it through out my liner . This
technology can make an aluminium fire wall provide very good fire protection
but what has not been mentioned is the mechanical strength of the fire wall
material to intrusion or damage and unfortunately aluminium cannot compete
with a good quality steel
cheers Gary
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