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<DIV><FONT face=Arial size=2>Anthony,</FONT></DIV>
<DIV><FONT face=Arial size=2>They are all correct. That is 30% of MAC or
mean aerodynamic chord. A reasonable estimate with double taper wing is to
add root chord plus tip chord divide by 2 and take 30% of that. For
example if the root is 18 inches and tip is 9 inches that adds to 27/2
equals 13.5 as your MAC. Go to your wing and locate it. It is about
halfway out. Take .30 equals 4.05 inches, mark it and go perpendicular to
the root rib and mark on the root rib. There is a very specific formula
for this in Ron Van Putte's old articles, but this is quick and dirty and will
get you there in the shop or at the field.</FONT></DIV>
<DIV><FONT face=Arial size=2></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=geobet@gis.net href="mailto:geobet@gis.net">george w. kennie</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, May 01, 2007 1:27 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Odyssey
CG</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Anthony,</FONT></DIV>
<DIV><FONT face=Arial size=2>Not trying to start a war here, but if that thing
has a tapered leading edge, I think you might want to move out almost half way
on the panel and then go for your 30%. If you start at the root, you may find
yourself flying a brick. Trimming on KE on a 45 degree upline might also be a
worthwhile addition to your trimming regime.</FONT></DIV>
<DIV><FONT face=Arial size=2>G.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></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=aabdu@sbcglobal.net href="mailto:aabdu@sbcglobal.net">Anthony
Abdullah</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, May 01, 2007 1:46
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Odyssey
CG</DIV>
<DIV><BR></DIV>
<DIV>Dr. Harrison,</DIV>
<DIV>Thank you very much for the information! I agree with you
completely that the CG is pilot specific. I tend to like my planes just a
hair tail heavy compared to others. What I was afraid of was having the CG
so out of whack that the plane would not survive its maiden flight.</DIV>
<DIV> </DIV>
<DIV>I know that 30% is the rule of thumb and I wanted to make sure that
applies to the Odyssey. Just to summarize and for example, If I am looking
at the wing root of one panel and the chord is 10 inches, I wand to start
with the CG roughly three inches from the leading edge at the root
(fuselage)?</DIV>
<DIV> </DIV>
<DIV>I will follow that and let you know how it turns out.</DIV>
<DIV> </DIV>
<DIV>Is there anything else I should know about the Odyssey?</DIV>
<DIV> </DIV>
<DIV>Thanks again</DIV>
<DIV>Anthony<BR><BR><B><I>"Dr. Mike Harrison"
<drmikedds@sbcglobal.net></I></B> wrote:</DIV>
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<DIV><FONT face=Arial size=2>Anthony,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I designed the Odyssey and I can't tell you
where it is, but I can recommend some guidelines. First, however let
me give some opinion as to the value of cg location. I believe the
optimum cg location is pilot sensitive, that is to say different flyers
prefer different cg's based on how the plane is set up. For that
reason I recommend a range that is easy to find then fly the airplane and
change the cg until you like the way it flies. Some points to
remember are to fly full speed then cut the throttle, the plane should
descend very slowly. If it descends rapidly, then it is nose
heavy. If it climbs, it is tail heavy. That will get you
close. After that make very small changes to suit your style.
On your root rib mark from 28 to 32 percent of the rib. That would
be a recommended range. You might start at 30% and work from
there. The stab is powerful on the Odyssey and requires expo for
best results so don't confuse a powerful elevator as tail heavy.
</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Good luck</FONT></DIV>
<DIV><FONT face=Arial size=2>Mike</FONT></DIV>
<BLOCKQUOTE
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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=aabdu@sbcglobal.net href="mailto:aabdu@sbcglobal.net">Anthony
Abdullah</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, April 30, 2007 12:38
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [NSRCA-discussion] Odyssey
CG</DIV>
<DIV><BR></DIV>
<DIV>Does anyone know where the CG should be on the
Odyssey?<BR><BR>TIA</DIV>
<DIV>Anthony</DIV>
<DIV>
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