<HTML><FONT FACE=arial,helvetica><FONT SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0">In a message dated 11/14/2003 2:54:25 AM Eastern Standard Time, wise@alaskalife.net writes:<BR>
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<BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Subj:<B>Question on building a Temptation </B><BR>
Date:11/14/2003 2:54:25 AM Eastern Standard Time<BR>
From:<A HREF="mailto:wise@alaskalife.net">wise@alaskalife.net</A><BR>
Reply-to:<A HREF="mailto:discussion@nsrca.org">discussion@nsrca.org</A><BR>
To:<A HREF="mailto:discussion@nsrca.org">discussion@nsrca.org</A><BR>
<I>Sent from the Internet </I><BR>
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What size ply should I use for the firewall. The drawings that come with<BR>
the plane show the firewall but don`t suggest a thickness for it. I`m<BR>
using a Hyde mount with the nose ring glued in the nose of the plane.<BR>
Thanks Jon</BLOCKQUOTE><BR>
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Jon, I use 1/8" aircraft ply (birch facings and at least 5 plies, 7 is better, stiffer). Lite ply could also be used but the 1/8" would need doubling up and would be a little heavier. It isn't necessary to use the more exotic material like end grain balsa with carbon cloth facings but if you have this stuff laying around, it will also work well. You will need ply circles where the blind nuts will be inserted, to reinforce the area. <BR>
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The all around best solution is the 1/8" a/c ply.<BR>
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Matt K</FONT></HTML>