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<DIV><SPAN class=460413813-16042004><FONT face=Arial color=#0000ff size=2>Hi
Nat,</FONT></SPAN></DIV>
<DIV><SPAN class=460413813-16042004><FONT face=Arial color=#0000ff size=2>The
long socket and joiner tube makes sense. Now what does your plane weigh? I know
that it isn't 11 lbs! If it is around 8 lbs, like I expect, then one should
be careful in extending that technique with heavier ships and/or shorter tubes.
</FONT></SPAN></DIV>
<DIV><SPAN class=460413813-16042004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=460413813-16042004><FONT face=Arial color=#0000ff size=2>Mark,
I once had a plane suffer the tube tear-out failure. Fortunately, I successfully
landed my new, super-dooper variable geometry winged Desire 120 and
made a repair. I don't think that I still have the drawing I did for a
column in FM about 10 years ago. I'll look. The neatest method, in my opinion is
to cut the wing core completely in half (make the kerf 1/8" wide) and white
glue the 1/8" lite-ply rib with tube hole and lightening holes, taking care to
keep it straight by curing the glue in the weighted core
beds.</FONT></SPAN></DIV>
<DIV><SPAN class=460413813-16042004><FONT face=Arial color=#0000ff size=2>Hope
it helps,</FONT></SPAN></DIV>
<DIV><SPAN class=460413813-16042004><FONT face=Arial color=#0000ff size=2>Dean
P.</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Nat Penton
[mailto:natpenton@centurytel.net]<BR><B>Sent:</B> Friday, April 16, 2004 12:34
AM<BR><B>To:</B> discussion@nsrca.org<BR><B>Subject:</B> Re: foam core
question<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>Mark I did not use support at the end of the wing
tube because the cores came to me sheeted. In this case I let the socket go
into the panel 18" and the tube almost 16". I have about 700 flights with no
problems. If I did have a problem it would be easy to remove a precise amount
of foam and replace with a light weight filler ( SuperFill ). Forget about
carbon strips and use .5oz carbon mat to apply the epoxy to. It will be
lighter by helping controll the amount of adhesive and, most
important, provide a torsionally very stiff wing <U>and</U>
aileron. Regards
Nat</FONT></DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=flyintexan@houston.rr.com
href="mailto:flyintexan@houston.rr.com">Mark Hunt</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> Thursday, April 15, 2004 9:16
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> foam core question</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Sirs:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>As a newbie to cutting foam cores, I have a
question regarding how to strengthen the wing panel. Does the
preferred method include attaching some c.f. strips to the inside of the
skins? Should they extend from the root all the way to the tip?
I know some guys feel it is a must to also use a false rib near the end of
the tube sleeve also? I hear that some guys (r u out there Nat?) are
confident without any false rib or c.f. under the skin....?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I cut the cores earlier tonight (to rebuild my
2M after a mid-air) with the help of a friend, and they turned out just
beautiful. I have a nice plan to machine a drill jig for cutting the
spar tube hole...so that's seems to be solved.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks in advance for the
help...<BR></FONT></DIV>
<DIV><FONT face=Arial size=2> </DIV></FONT>
<DIV><FONT face=Arial size=2>Mark</FONT></DIV>
<DIV><FONT face=Arial size=2><A
href="http://www.geocities.com/markhunt_2000/INSIGHT">www.geocities.com/markhunt_2000/INSIGHT</A></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial
size=2> </DIV></BLOCKQUOTE></BLOCKQUOTE></FONT></BODY></HTML>