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<DIV><FONT face=Arial size=2>Anthony,</FONT></DIV>
<DIV><FONT face=Arial size=2>He doesn't want you to go out 13.5 inches from the
root section of the wing. He wants you to move out on the panel to a point
where the wing measures 13.5 inches from the leading edge to the trailing edge,
in other words, the point where the CHORD of the wing is equal to 13.5 inches
wide, and that's probably going to happen around 17 or 18 inches out. On top of
that, you're going to have to use the actual numbers ( chord/tip) from YOUR
wing.</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> Wednesday, May 02, 2007 9:21
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Odyssey
CG</DIV>
<DIV><BR></DIV>
<DIV>A huge thank you to all that have provided information. I apologize for
my ignorance, I am one of those people that tends to follow the plans as a
starting point and fine tune from there. As such I do not have a firm grasp of
the concept yet but love learning about it.</DIV>
<DIV> </DIV>
<DIV>Simple question:</DIV>
<DIV>Does the 13.5 in the below example refer to the distance out from the
center of the fueslage or from the root rib? As I understand it, if I go out
13.5 from that point (fuse center I believe) and draw a perpendicular
line that will be my MAC. Setting the CG from there is just a matter of taking
25% to 30% of the MAC distance out (13.5 for example) and marking that on
the fuse at the root rib?<BR></DIV>
<DIV> </DIV>
<DIV>Thanks again for all of your help!!</DIV>
<DIV>With any luck the next thing you hear from me will be a successful maiden
flight report.</DIV>
<DIV>Anthony</DIV>
<DIV><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>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>
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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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