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<DIV><FONT size=2> Reeves, correct me if I am wrong. The
way I understand it, you are applying carbon fiber to both sides of 1/4 inch
balsa to form your firewall. If that is correct, I would say that would be
more than sufficient. I do not have any experience with that
exact set-up, but I use 1/8 inch honeycomb carbon fiber sheet for my
firewalls, and using the same engine mount you are that supports an O.S. 140
RX. I am building a new plane with the same set-up with a 3M 170, and I am
very confident that it will be plenty strong enough. The Hyde mount
eliminates enough of the vibration from the firewall, that you would be
surprised what you would be able to get away with. You may want to add a
vertical piece of 1/2 inch aluminum angle stock to the back side of the firewall
for the two bolts that support the nose ring support, to help prevent any
flexing that may occur in the firewall. I do not use that method on my
plane, but that was a suggestion to me from Merle Hyde when mounting that mount
on a thin firewall. The carbon fiber is so strong, I do not feel it is
necessary, but you may feel it is.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Just my two cents, hope this helps,</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Mike Darr</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=reeves@mtaonline.net href="mailto:reeves@mtaonline.net">Reeves</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, September 07, 2003 5:46
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Firewall for Hyde Mount</DIV>
<DIV><BR></DIV>
<DIV><FONT size=2>Hi, I plan to install a Hyde ARI (A) mount in a new Synergy
I am building. This is the mount with the nose ring incorporated on an
aluminum yoke. I was going to use carbon fiber end grain balsa composite
1/4" thick for the firewall material. Is this material stiff enough?
Anyone else using this setup with success? Thanks, Reeves in
Alaska. </FONT></DIV></BLOCKQUOTE>
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