<!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 6.00.2900.2722" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>If there was a "perfect" plane I could use a couple
myself. Jim Ivey makes a good point, however, I set my incidences at 0 and
0, or as close as I can, and balance from there. My wing incidence could
very well be a fraction in the positive, I don't have an accurate enough device
to check that close.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>On another note, if Troy says his way works for
him, I certainly can't argue that, he is a much more competant pilot than
I. I haven't noticed a tracking problem, in my set-up, and I am not at the
stage that my snaps are being judged, so I can't say.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Once your questions go toward aeronautical theory,
I have to resign myself to reading the writings of the more
knowledgable.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I did my best.:-)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Ken</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=super7@adelphia.net href="mailto:super7@adelphia.net">Thomas P.
Fiorentino</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> Sunday, September 11, 2005 9:56
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Incidence or CG?</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Symetrical airfoil wing design needs some AOA to
create lift though...no?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I'll buy a dozen of those perfect planes if they
are out there!</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=mrandmrst@comcast.net href="mailto:mrandmrst@comcast.net">Ken
Thompson</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> Sunday, September 11, 2005 3:35
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Incidence or CG?</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>You shouldn't need an aft CG to create lift,
the wing design will do that for you. If your "assumption plane" flies
level, both upright and inverted, with no elevator input, I call that the
"perfect" CG.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>At least that is my opinion.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Ken</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=super7@adelphia.net href="mailto:super7@adelphia.net">Thomas P.
Fiorentino</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> Sunday, September 11, 2005 8:51
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Incidence or CG?</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>OK thats helpful Ken. I have a pattern
ARF that I am tinkering with and having some fun. The downlines are
really nice, but I hold too much down on inverted flight. I'll move
the CG aft a little and see where that takes me.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Here is my follow-up question because I can't
help myself. Lets assume you have a plane with wing and stab at
0 degrees. Lets assume further that you have no elevator trim
and the engine has no thrust adjustments. If this assumption
airplane actually flew level...would an aft CG be responsible for creating
the right AOA on the wing to create lift? Am I understanding this
correctly?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks for your input!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Tom</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=mrandmrst@comcast.net href="mailto:mrandmrst@comcast.net">Ken
Thompson</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> Sunday, September 11, 2005
6:38 AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Incidence or CG?</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>If you had a little positive incidence in
the main wing, to fly level in upright flight, you would have it
corrected by incidence in the stab or possibly elevator trim. When
you roll inverted the correction remains constant.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Ken</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=super7@adelphia.net href="mailto:super7@adelphia.net">Thomas
P. Fiorentino</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> Sunday, September 11, 2005
12:29 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Incidence or CG?</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Bear with me on this question
guys...</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I know the test for CG is to roll
inverted and watch for nose down or tail down. But relative to
everything else why wouldn't wing incidence screw you up
inverted? Seems to me that all things remaining equal, if you
had a little positive wing incidence and level flight upright that the
nose would drop when inverted....Where is the blind spot in my
logic?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Tom
Fiorentino</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>