Joe;
You have a good point. Perhaps what you suggest is a good approach; the
sheets are factory marked with the manufacturer's name, alloy, and heat
number so perhaps a good photo might be adequate supporting evidence.
If anyone doubts the heat resistance of Inconel, I could bring my
torch......
Regards, Neil Tucson, AZ
-----Original Message-----
From: Joe Timney [mailto:joetimney@dol.net]
Sent: Friday, April 05, 2002 2:28 PM
To: Albaugh, Neil
Cc: land-speed@autox.team.net
Subject: Re: Rulebook Firewall Question
Neil,
There would not be any easy way to identify the material a firewall was made
of.
as the only tools an inspector has are dial calipers and a tape measure. The
rule
book does states the any exceptions are to be outlined in a letter,
including any
calculations, submited to the racing organization before the meet.
joe
"Albaugh, Neil" wrote:
> List;
>
> I received my new 2002 SCTA Rulebook in the mail yesterday and started
> reading it to make sure I build my car in compliance with the regulations.
> The "firewall" requirement seems to be somewhat vague in that it requires
a
> minimum 0.090" metal firewall between the driver & engine. The vagueness
is
> in the word "metal"-- it is not specific about what firewall material is
> acceptable. This even implies that a 0.090" 5052-0 aluminum firewall would
> be acceptable.
>
> Last year I bought some thinner Inconel sheets with the idea of riveting
> them to the chassis tubes (with Monel rivets) and using Inconel as my
> firewall. It looks as if this won't be legal even though Inconel is a
high-
> temperature stainless steel that is used to fabricate jet engines.
Aluminum,
> on the other hand, looks to be a perfectly legal firewall material even
> though it melts at less than 1000 degrees. That doesn't seem to be
> consistent with safety-- I'd rather be behind (actually, 'ahead of' in my
> case-- a mid- engine setup) an Inconel firewall than one made of most
other
> "metals."
>
> Is there any flexibility in this rule interpretation?
>
> Regards, Neil Tucson, AZ (end of whining & sniveling)
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