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<DIV><FONT face=Arial size=2>Dean,</FONT></DIV>
<DIV><FONT face=Arial size=2> Thanks for the info on the Bipe
CG. Out of curosity, wouldn't the same result be found by independently
calculating the 25% point on each wing individually and averaging them
?</FONT></DIV>
<DIV><FONT face=Arial size=2> </FONT></DIV>
<DIV><FONT face=Arial size=2> Regarding the ailerons - I have
never looked that closely at the aileron LE. Both wings have the same
quirk - the aileron LE protrudes ~ 1/32 down near the root for about 2.5 " and
about 1/32 up at the center for about 5". </FONT></DIV>
<DIV><FONT face=Arial size=2> What do you think ?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks,</FONT></DIV>
<DIV><FONT face=Arial size=2>Paul</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<BLOCKQUOTE dir=ltr
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=d.pappas@kodeos.com href="mailto:d.pappas@kodeos.com">Dean Pappas</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, December 08, 2005 3:22
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: CG for Biplane and more
control sensitivity</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=921461621-08122005><FONT face=Arial color=#0000ff size=2>Hi
Paul, </FONT></SPAN></DIV>
<DIV><SPAN class=921461621-08122005><FONT face=Arial color=#0000ff size=2>It's
the wing area weighted average of the 25% (or whatever) MAC of each
wing.</FONT></SPAN></DIV>
<DIV><SPAN class=921461621-08122005><FONT face=Arial color=#0000ff size=2>If
the areas are equal, it is centered between the 25% MAC of the bottom and
the 25% MAC of the top. </FONT></SPAN></DIV>
<DIV><SPAN class=921461621-08122005><FONT face=Arial color=#0000ff size=2>If
the top wing has, say, double the area of the bottom wing, then it's 2/3 of
the way from the 25% MAC of the bottom to the 25% MAC of the
top.</FONT></SPAN></DIV>
<DIV><SPAN class=921461621-08122005><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=921461621-08122005><FONT face=Arial color=#0000ff
size=2>While I am here: did the throw reduction fix your sensitivity
problem?</FONT></SPAN></DIV>
<DIV><SPAN class=921461621-08122005><FONT face=Arial color=#0000ff size=2>One
other variable is hingeline shape. If the leading edges of the the
ailerons protrude above the wing surface this can cause all sorts of
issues.</FONT></SPAN></DIV>
<DIV><SPAN class=921461621-08122005><FONT face=Arial color=#0000ff size=2>It
wasn't likely, so I didn't bother to chime in, before.</FONT></SPAN></DIV>
<DIV><SPAN class=921461621-08122005><FONT face=Arial color=#0000ff
size=2>later,</FONT></SPAN></DIV>
<DIV><SPAN class=921461621-08122005><FONT face=Arial color=#0000ff
size=2>Dean</FONT></SPAN></DIV>
<DIV><SPAN class=921461621-08122005><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<P><FONT face="Times New Roman">Dean Pappas</FONT> <BR><FONT
face="Times New Roman">Sr. Design Engineer</FONT> <BR><FONT
face="Times New Roman">Kodeos Communications</FONT> <BR><FONT
face="Times New Roman">111 Corporate Blvd.</FONT> <BR><FONT
face="Times New Roman">South Plainfield, N.J. 07080</FONT> <BR><FONT
face="Times New Roman">(908) 222-7817 phone</FONT> <BR><FONT
face="Times New Roman">(908) 222-2392 fax</FONT> <BR><FONT
face="Times New Roman">d.pappas@kodeos.com</FONT> </P>
<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>
discussion-request@nsrca.org [mailto:discussion-request@nsrca.org]<B>On
Behalf Of </B>paul<BR><B>Sent:</B> Thursday, December 08, 2005 4:00
PM<BR><B>To:</B> discussion@nsrca.org<BR><B>Subject:</B> CG for
Biplane<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2> Anyone know how the
calculate the CG for a Biplane ? I expect it is 25-30% of the MAC;
but, how do I calculate the MAC for a biplane ?</FONT></DIV>
<DIV><FONT face=Arial size=2>Thanks,</FONT></DIV>
<DIV><FONT face=Arial
size=2>Paul</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>