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<DIV><STRONG><FONT size=2>I think the issues of center of pressures are also at
issue with rolling inputs.. An aircraft can be forced to rotate not
exactly on its cg.. EG a barrel roll. </FONT></STRONG></DIV>
<DIV><STRONG><FONT size=2> </FONT></STRONG></DIV>
<DIV><STRONG><FONT size=2> Del </FONT></STRONG></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 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=billglaze@triad.rr.com href="mailto:billglaze@triad.rr.com">Bill
Glaze</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> Wednesday, January 08, 2003 7:54
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: where does the model
roll?</DIV>
<DIV><BR></DIV>Jim:<BR>True. The C.G. is much more than the common point
we use to balance our<BR>aircraft. It is actually, as I'm sure you know,
a point in space that is,<BR>generally, depending on design, not reachable by
normal means. On most<BR>"normal' configuration of monoplanes, somewhere
inside the fuselage. Rotation<BR>is considered to be about this
point.<BR><BR>Bill Glaze<BR><BR><BR>JOddino wrote:<BR><BR>> ----- Original
Message -----<BR>> From: "Koenig, Tom" <<A
href="mailto:Tom.Koenig@actewagl.com.au">Tom.Koenig@actewagl.com.au</A>><BR>>
To: "'Discussion'" <<A
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A>><BR>> Sent:
Wednesday, January 08, 2003 3:31 PM<BR>> Subject: where does the model
roll?<BR>><BR>> > Hi Guys,<BR>> ><BR>> > I've just been
asked this question.........it never occurred to me to<BR>> really<BR>>
> think about this, now I'm open to opinions, facts and anyone that has
the<BR>> > cold hard knowledge.<BR>> ><BR>> > I have always
assumed that a model rolls around the datum line ie: the<BR>> >
crankshaft center line (not taking down and side thrust into<BR>>
consideration)<BR>> ><BR>> > Now a mate of mine swears black and
blue that in actual fact the model<BR>> rolls<BR>> > around the wing
center line ie: it is the wing that rolls and all else<BR>> > scribes an
arc around this.<BR>> ><BR>> > Can anyone can set us
straight......please?<BR>> ><BR>> > Thanks<BR>> ><BR>>
> Tom<BR>> ><BR>> I'll say it rolls around the cg but how many of
you know where the cg is<BR>> along the vertical axis?<BR>><BR>>
Jim<BR>><BR>> =====================================<BR>> # To be
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