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<DIV>I used Laszlo (Les) on Nat's recommendation and have used no one else
since. The best cores in the business without a doubt. My latest taper ratio
BTW, flying on Temptress, is nearly 3:1.</DIV>
<DIV> </DIV>
<DIV>Also, he is reasonably priced.</DIV>
<DIV> </DIV>
<DIV>Mark, Les cut standard exponential curve airfoil cores according
to my specs. His CNC cutter has alot of capability so it's just a question
of what you want.</DIV>
<DIV> </DIV>
<DIV>If a composite hollow wing is what you are after, the husks may be used as
backing to lay up 1/64" ply into, and finish out in epoxy. Then wax and prep as
you would any mold and apply your composite layers. Let cure and voila!!</DIV>
<DIV> </DIV>
<DIV>MattK</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>In a message dated 11/15/2005 11:24:26 AM Eastern Standard Time,
natpenton@centurytel.net writes:</DIV>
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<DIV><FONT face=Arial size=2>The best foam cores in the country can be
acquired from:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial
size=2>
Laszlo Horvath</FONT></DIV>
<DIV><FONT face=Arial
size=2>
RD 1 Box 844</FONT></DIV>
<DIV><FONT face=Arial
size=2> Dingmans
Ferry, Pa 18328</FONT></DIV>
<DIV><FONT face=Arial
size=2>
Phone 570 - 828 7396</FONT></DIV>
<DIV><FONT face=Arial size=2>He can cut taper ratios greater than
2/1. Nat Penton</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=mailto:johnferrell@earthlink.net
href="mailto:johnferrell@earthlink.net">John Ferrell</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> Tuesday, November 15, 2005 8:12
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: help with chosing airfoil
section's for wing and tail. 2 meter</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>I am not familiar with that
airplane.</FONT></DIV>
<DIV><FONT face=Arial size=2>Building a foam wing strong,stiff and precise
is easy compared to doing the same with a built up wing.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>All pattern birds I am aware of use symmetrical
airfoils as thick as they need to be to be strong. dihedral is important.
Leading edge sweep is more important than trailing edge sweep. Most
designers like the tips to be 50% of the root but this may be influenced by
the difficulty in cutting foam at greater than a 2:1 ratio. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The only quality issues that I can think of
that condemn a foam wing core are weight poorly formed beads. If you can
build a built up wing, you can fix everything else!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Each maneuver flown should be considered when
tinkering with wing parameters. There are a lot of nice planes that are
tough to snap or spin. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I must have an airplane that helps my
weaknesses!</FONT></DIV>
<DIV> </DIV>
<DIV>John Ferrell <BR><A title=http://dixienc.us/
href="http://dixienc.us/">http://DixieNC.US</A><BR></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:DrMarkMD@aol.com
href="mailto:DrMarkMD@aol.com">DrMarkMD@aol.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> Tuesday, November 15, 2005 8:18
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> help with chosing airfoil
section's for wing and tail. 2 meter</DIV>
<DIV><BR></DIV><FONT face=arial,helvetica><FONT face=Geneva color=#000000
size=2 FAMILY="SANSSERIF">I was not happy with the cores I got from the
kit I purchased so decided to try to build a hollow composite wing for my
Ricochet electric power and weighing in at 10.75 lb.. Since I
will be able to now pick the sections. I would like to learn from you guys
rather than trial and error. Would you guys mind sharing your
choices and thoughts. <BR><BR>Mark Lamos<BR>Baltimore</FONT><FONT
face=Geneva color=#000000 size=2 FAMILY="SANSSERIF"></FONT>
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