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<DIV><FONT face=Arial size=2>Exactly Ted...</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Like when doing a 1/2 Cuban eight on the ends in
Intermediate. The 45 degree line will appear to be steep if it is
done at 45 degrees. When done to look right the angle will be shallower and
the plane will also finish the maneuver closer to center depending on how far
out the maneuver was started. </FONT></DIV>
<DIV><FONT face=Arial size=2>OR the figure 8 on center. The new square 8
in Master is going to be an interesting one to judge too.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Good points and something that should be discussed
in judging seminars.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Wayne Galligan</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=tedsander@comcast.net href="mailto:tedsander@comcast.net">Ted
Sander</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> Saturday, August 21, 2004 8:26
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: Some Diagrams</DIV>
<DIV><BR></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Very interesting
Bob! A few years ago I was messing around with a 3D animation program
(Bryce 3), and tried my hand at making a clip showing a plane tracing out a
basic loop while following a “ribbon in the sky” – ie, the path looked like
those shown in the maneuver descriptions in the AMA rule book. It
allowed for perspective effects, placement of viewpoint and all the other
usual stuff a 3D program can do. So, on to my point: When I
mathematically made the loop perfectly round, it had a distinct egg shape to
it when the view point was moved from the same level as the center of the
radius, to a more typical 5 ft from the ground, looking up. In order to
get a loop that looked round from a typical judge/pilot position, I had to
squish it from the top a fair bit – indicating to me that as we fly our planes
over the top, it’s not enough to keep the radius consistent, we actually have
to pull harder on the top side, to keep everything looking right – in other
words, we don’t actually fly a true constant radius loop, because of
perspective effects. Makes it all so much harder than just keeping
airspeed and angle of attack constant – because we have to vary the shape to
make it look right. While I didn’t go back to look at other maneuvers in
more detail, it has always stuck with me that this effect also rears it’s head
everywhere else too. Kind of the visual version of the upwind/downwind
debates – so much depends on the frame of reference. Would be
interesting to hear others take on this subject……</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Ted
Sander</SPAN></FONT><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"> </SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">-----Original
Message-----<BR><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B>
discussion-request@nsrca.org [mailto:discussion-request@nsrca.org] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Bob Pastorello<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Tuesday, August 17, 2004 6:14
PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> NSRCA<BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> Some Diagrams</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt"></SPAN></FONT> </P>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">After getting some feedback about
geometry, I thought I'd draw out a few of my more problematic ones. They
may help you, too....</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><A
href="http://www.rcaerobats.net/ManueverDiagrams.htm">http://www.rcaerobats.net/ManueverDiagrams.htm</A></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><BR>Bob Pastorello<BR><A
href="mailto:rcaerobob@cox.net">rcaerobob@cox.net</A><BR><A
href="http://www.rcaerobats.net">www.rcaerobats.net</A></SPAN></FONT></P></DIV>
<DIV>
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style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT> </P></DIV>
<DIV>
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style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV></DIV></BLOCKQUOTE></BODY></HTML>