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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>It does. That is what causes the
plane to weather-vane, weather-cock or whatever you want to name it into the
wind. The nose does turn into the wind (again from my experience).
The faster you are flying the less this occurs due to the aerodynamics of the
vertical fin etc coming into play.. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Theory on my part<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>There is a point on the plane close to the
CG where the plane will yaw around when a force is applied be it with rudder or
wind blowing from the side. If the forces were equal in front and behind
this point the plane will just blow with the wind. If the force is
greater behind this point (think of the vertical fin and rudder on a long
moment arm, the fuse) then the plane should turn into the wind. The wind
blowing on the rear of the plane will produce a greater force than the wind
blowing on the plane in front of this point. I do not think it matters if the
plane is on the ground or flying. It will still turn the same way, obviously
much greater with the plane on the ground and a friction point available.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Stuart<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Jerry Voth<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, October 10, 2007
4:34 PM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">NSRCA
Mailing List</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [NSRCA-discussion]
Rudder</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'>I've been folloing this thread and there is one thing that puzzles me.
The vertical fin and rudder are (and I'm guessing) about 20% of the total side
area of a pattern plane. If it were weathervaning,why wouldn't the nose be more
prone to blow in the direction of the wind?</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<blockquote style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>----- Original Message ----- <o:p></o:p></span></font></p>
</div>
<div style='font-color:black'>
<p class=MsoNormal style='background:#E4E4E4'><b><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial;font-weight:bold'>From:</span></font></b><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:drykert2@rochester.rr.com" title="drykert2@rochester.rr.com">Del
K. Rykert</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>To:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:nsrca-discussion@lists.nsrca.org"
title="nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Sent:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> Wednesday, October
10, 2007 2:23 PM<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Subject:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> Re:
[NSRCA-discussion] Rudder<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Thank goodness judges don't have a T &
B ball in a panel in front of them to watch how many are skidding through the
air.. grins.. I have always felt if all things are pure the pattern
airplane in true corrected crab maintains it same speed when pulling to
vertical and the crosswind component stays constant then no further input is
needed till your speed starts to decay when pulling vertical. What many
are doing is flying one wing low when in level fight then when they pull
vertical have to sneak in some extra correction for pulling a highly visible
vertical to the judges. </span></font><o:p></o:p></p>
</div>
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<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'> </span></font><o:p></o:p></p>
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<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'> <st1:State w:st="on"><st1:place
w:st="on">Del</st1:place></st1:State></span></font> <o:p></o:p></p>
</div>
<blockquote style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>----- Original Message ----- <o:p></o:p></span></font></p>
</div>
<div style='font-color:black'>
<p class=MsoNormal style='background:#E4E4E4'><b><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial;font-weight:bold'>From:</span></font></b><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:jim.woodward@baesystems.com" title="jim.woodward@baesystems.com">Woodward,
Jim</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>To:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:nsrca-discussion@lists.nsrca.org"
title="nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Sent:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> Wednesday, October
10, 2007 1:31 PM<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Subject:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> Re:
[NSRCA-discussion] Rudder<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Bob – the correct answer on using
aileron during a radius, for the purpose of wind correction, is that if you are
NOT using it is a downgrade(able). It’s impossible in every
way to use only rudder through a radius actually keep the
“wings-level” to the intended flight path.<O:P></O:P></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><O:P></O:P>Maneuvers are to be
wind-corrected and flown in a single vertical plane – anything less is
uncivilized </span></font><font size=2 color=navy face=Wingdings><span
style='font-size:10.0pt;font-family:Wingdings;color:navy'>J</span></font><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'> </span></font><o:p></o:p></p>
<O:P></O:P>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><O:P></O:P>The wings should be
“level” at every part of the curve/radius, and the only way to do
that is by rolling the plane, slightly.<O:P></O:P></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thanks,<O:P></O:P></span></font><o:p></o:p></p>
<p class=MsoNormal><ST1:PERSONNAME u1:st="on"><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'>Jim</ST1:PERSONNAME>
W.<O:P></O:P></span></font><o:p></o:p></p>
<div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'><O:P></O:P><O:P></O:P>From:</span></font></b><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Bob Richards<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, October 10, 2007
1:19 PM<br>
<b><span style='font-weight:bold'>To:</span></b> <ST1:PERSONNAME u1:st="on"><st1:PersonName
w:st="on">NSRCA Mailing List</ST1:PERSONNAME></st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [NSRCA-discussion]
Rudder</span></font><O:P></O:P><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><O:P></O:P>That is the best description I have read so far. Agree 100%.<O:P></O:P><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><O:P></O:P>Not long ago, I was talking with someone about wind
correction and mentioned that a very small amount of aileron should be used
when pulling a radius to a vertical line. He said if he ever saw me do it while
he was judging, he would downgrade. I told him if I do it right, he will never
see it. :-)<O:P></O:P><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><O:P></O:P>Bob R.<O:P></O:P><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<br>
<b><i><span style='font-weight:bold;font-style:italic'>J N Hiller
<jnhiller@earthlink.net></span></i></b> wrote:<O:P></O:P><o:p></o:p></span></font></p>
</div>
<blockquote style='border:none;border-left:solid #1010FF 1.5pt;padding:0in 0in 0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><span class=EmailStyle21><font size=2 color="#993366"
face=Arial><span style='font-size:10.0pt'>This has been an interesting
discussion. The airplane dose not establish a crab angle on it’s own when
in the air. The airplane has a crab angle in horizontal flight and when it is
pulled vertical the wings will not be perpendicular to the flight path without
a roll correction. The need for the correction will be apparent and automatically
applied prior to finishing the radius. When a roll input is applied with
elevator it changes the heading in the direction of roll, (think barrel roll)
in this case into the wind as it finishes the radius. Most of the time it will
be excessive requiring a little opposite (down wind) rudder correction unless
the upwind wing was high entering the pull-up. Once the airplane is leaning to
one side in a vertical the lean will increase and is especially noticeable as
it slows. Some increase is needed to maintain wind correction and the need for
opposite rudder to maintain a vertical track depends on how rapidly the
airplane is decelerated. Most of the time I will try to apply some down wind
rudder with the roll correction at about 45 degrees, before the need becomes
visible as it is nearly always required. In short just point the airplane in
the direction you want it to go and stir the sticks as necessary.<O:P></O:P></span></font></span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><ST1:PERSONNAME u1:st="on"><span class=EmailStyle21><font
size=2 color="#993366" face=Arial><span style='font-size:10.0pt'>Jim</ST1:PERSONNAME>
Hiller<O:P></O:P></span></font></span><o:p></o:p></p>
</div>
</blockquote>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><O:P></O:P><O:P></O:P> <o:p></o:p></span></font></p>
</div>
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