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<DIV>With regard to the weight savings of the glue that has been mentioned by
several people..............you can save the glue weight whether you honeycomb
or not.</DIV>
<DIV> </DIV>
<DIV>I've done wings both ways - to me, it is clearly not worth the fuss on thin
airfoils (or stabs, or rudders/fins). I use the same amount of glue either
way, so even on the fatter wings, the weight savings is at most 1 oz per panel -
and without a doubt, the wing becomes more prone to damage from hanger
rash.</DIV>
<DIV> </DIV>
<DIV>Dave</DIV>
<DIV> </DIV>
<DIV>----- Original Message ----- </DIV>
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<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=AtwoodDon@aol.com
href="mailto:AtwoodDon@aol.com">AtwoodDon@aol.com</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> Wednesday, July 27, 2005 10:30
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Foam Honey-Coming Weight
savings</DIV>
<DIV><BR></DIV><FONT id=role_document face=Arial color=#000000 size=2>
<DIV>
<DIV>The amount of weight saved by honeycombing a wing is more than the foam
weight. It is a combination of the foam weight and the epoxy or adhesive
you don't use in those areas. Once the foam is honeycombed, take the
template and very lightly mark the outline of the honeycomb on the inside of
each wing skin. Then only apply adhesive to the areas of the balsa skin
that will contact the foam. The combination of the foam weight reduction
as well as the reduced adhesive will give you the greatest reduction.
Admittedly, the reduction is not large but when you consider reducing an ounce
in a 11 or 12 oz wing panel, the percentage is respectable.</DIV>
<DIV> </DIV>
<DIV>Don Atwood</DIV>
<DIV> </DIV>
<DIV>you have the wing honeycombed, In a message dated 7/27/2005 7:22:37 P.M.
Pacific Daylight Time, kerlock@comcast.net writes:</DIV>
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<DIV><FONT face=Arial size=2>Yup a little.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Whether it's worth it or not totally depends on
the amount of weight you're looking for. Actually cutting the honeycomb
isn't too difficult or time consuming, but making the templates can be a
little painstaking. However once you have them, you have them for a few
planes.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I am currently running a fairly thick tip
section, and performed honeycombing on the outer half of the wing panel past
the spars. It saved about an ounce per panel compared to the first set I
made. So, you save a couple of ounces, and remove some mass from your
wingtips. Does it help? I'm sure it doesn't hurt, and theoretically (being
the operative word) it can help in dampening snaps and spins...but not a
lot, unless your tips are really heavy to begin with. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>If you're building an electric or a plane that
historically comes out close to the limit, it could be worth the effort. I'm
not sure it's worth it on a 10 lb or less plane.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Just my 2 cents.</FONT></DIV>
<DIV><FONT face=Arial size=2>-Mike</FONT></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=mailto:Jim_Woodward@beaerospace.com
href="mailto:Jim_Woodward@beaerospace.com">Jim_Woodward@beaerospace.com</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=mailto:discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, July 27, 2005 4:46
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Foam Honey-Coming Weight
savings</DIV>
<DIV><BR></DIV><BR><FONT face=sans-serif size=2>Hi Guys,</FONT>
<BR><BR><FONT face=sans-serif size=2>Does anyone happen to have some
experience in weight reductions from foam honey-combing? Wing cores,
stab cores, vertical fin and rudder cores? Maybe a 25% weight
reduction?</FONT> <BR><BR><FONT face=sans-serif size=2>Thanks,</FONT>
<BR><FONT face=sans-serif size=2>Jim W.</FONT>
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