<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2900.2769" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><SPAN class=984182422-08122005><FONT face=Arial color=#0000ff size=2>Hi
Paul,</FONT></SPAN></DIV>
<DIV><SPAN class=984182422-08122005><FONT face=Arial color=#0000ff
size=2>Question 1 Yes, but only if the two wings have equal
area.</FONT></SPAN></DIV>
<DIV><SPAN class=984182422-08122005><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=984182422-08122005><FONT face=Arial color=#0000ff
size=2>Question 2 If you get completely (and I do mean completely) baffled by
the problem, then think about a way to investigate the problem. Have you flown
the plane with less throw? How fast is your maximum roll rate? Do you just have
way too much roll rate available at 100% ATV?</FONT></SPAN></DIV>
<DIV> </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 4:57 PM<BR><B>To:</B>
discussion@nsrca.org<BR><B>Subject:</B> Re: CG for Biplane and more control
sensitivity<BR><BR></FONT></DIV>
<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></BLOCKQUOTE></BODY></HTML>