<html>
<body>
<br>
J & B<br>
Weather vane implies the wind blowing the tail away from and the nose
into the wind which would be desirable for (self)correcting for
crosswind. This would imply that an airplane on a cross country flight
would self correct into a crosswind, no crab necessary. Or the reverse,
pilot would have to hold rudder for a couple of hours on a cross country
flight. Talk about a way to induce asymmetrical leg
muscles...wow!<br><br>
Rudder is used to point the noise into the wind i.e. to induce crab. Full
scale pilots make a small coordinated turn into the wind to create crab
angle and the desired ground track. I think I read in some pattern stuff
that pattern pilots can induce crab and it either presents better to a
judge or they can sneak the crab in a way not so easily detected by the
judge. Weathervaning would only happen on the ground with a
taildragger, usually the beginning of a ground loop. Or with the airplane
on a pylon on the vertical axis, just like a weathervane.<br><br>
Crab angle and track apply here. Crosswind acts upon the whole airplane
in flight, not just the tail surface. If we turn this whole situation 90
degrees and fly into a headwind and pull up, the airplane would flop over
on its back because of the greater exposed surface of the wing area. The
wing would have a greater weathervane effect. But it does not work
thataway.<br><br>
Bob and I have been having fun with this one for a while.<br><br>
Terry Beachler<br><br>
At 13:01 10/9/2007, you wrote:<br><br>
<blockquote type=cite class=cite cite="">
<font face="Arial, Helvetica" color="#0000FF">weathervane by cause of
wind. If you straighten the plane out to look vertical, the track (actual
line drawn) will move with the wind and not be vertical and be cause for
a downgrade. Someone has a clip from the rule book covering all parts of
this.<br>
</font> <br><br>
<font size=2>Regards,<br>
Jason<br>
<a href="http://www.jasonshulman.com/" eudora="autourl">
www.jasonshulman.com</a><br>
<a href="http://www.shulmanaviation.com/" eudora="autourl">
www.shulmanaviation.com</a><br>
<a href="http://www.composite-arf.com/" eudora="autourl">
www.composite-arf.com</a></font> <br>
<dl>
<dd><font face="Tahoma" size=2>-----Original Message-----<br>
<dd>From:</b> nsrca-discussion-bounces@lists.nsrca.org
[<a href="mailto:nsrca-discussion-bounces@lists.nsrca.org" eudora="autourl">
mailto:nsrca-discussion-bounces@lists.nsrca.org</a>]On Behalf Of
</b>Terry Beachler<br>
<dd>Sent:</b> Tuesday, October 09, 2007 12:53 PM<br>
<dd>To:</b> NSRCA Mailing List<br>
<dd>Subject:</b> Re: [NSRCA-discussion] Rudder<br><br>
</font>
<dd>Do you mean crab (induce by rudder) or weathervane as if the wind is
applying a force upon the tail and causing a turn toward the wind about
the vertical axis.<br><br>
<dd>Terryb<br><br>
<dd>At 12:10 10/9/2007, you wrote:<br><br>
<blockquote type=cite class=cite cite="">
<dd><font face="Arial, Helvetica" color="#0000FF">Hi Bob,<br>
</font>
<dd> <br>
<dd><font face="Arial, Helvetica" color="#0000FF">The airplane should
weathervane into the wind, as long as the track of the plane is straight
(track- actual line/path of the plane). <br>
</font>
<dd> <br><br>
<dd><font size=2>Regards,<br>
<dd>Jason<br>
<dd><a href="http://www.jasonshulman.com/" eudora="autourl">
www.jasonshulman.com</a><br>
<dd><a href="http://www.shulmanaviation.com/" eudora="autourl">
www.shulmanaviation.com</a><br>
<dd><a href="http://www.composite-arf.com/" eudora="autourl">
www.composite-arf.com</a></font>
<dl>
<dd><font face="Tahoma" size=2>-----Original Message-----
<dd>From: nsrca-discussion-bounces@lists.nsrca.org [
<a href="mailto:nsrca-discussion-bounces@lists.nsrca.org%5DOn" eudora="autourl">
mailto:nsrca-discussion-bounces@lists.nsrca.org]On</a> Behalf Of Bob
Wilson
<dd>Sent: Tuesday, October 09, 2007 8:53 AM
<dd>To: nsrca-discussion@lists.nsrca.org
<dd>Subject: [NSRCA-discussion] Rudder<br><br>
</font>
<dd>Some great ideas.
<dd>I'm going to give the 60-70% rudder expo a shot and see how it
works.<br>
<dd>
<dd>I'd like to do the stall turns on low rate, as Jason reccommends, but
when stall turning into the wind my practice airplane will not go
vertical (on the downline) unless I have high rates (it weathervanes
slightly towards the wind). <br>
<dd>
<dd>I also liked John Pavlick's recommendation on the two consecutive
rolls. I'm probably being too anal in coordinating rudder, aileron
and elevator because I always seem to run out of room.<br>
<dd>
<dd>So much to learn and the damn winter is coming!<br>
<dd>
<dd>Thanks guys,<br>
<dd>
<dd>Bob Wilson<br><br>
</dl>
<dd>_______________________________________________<br>
<dd>NSRCA-discussion mailing list<br>
<dd>NSRCA-discussion@lists.nsrca.org<br>
<dd>
<a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion" eudora="autourl">
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a><br><br>
<br>
<dd>No virus found in this incoming message.<br>
<dd>Checked by AVG Free Edition. <br>
<dd>Version: 7.5.488 / Virus Database: 269.14.6/1059 - Release Date:
10/9/2007 08:44</blockquote><br>
</dl>_______________________________________________<br>
NSRCA-discussion mailing list<br>
NSRCA-discussion@lists.nsrca.org<br>
<a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion" eudora="autourl">
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a><br><br>
<br>
No virus found in this incoming message.<br>
Checked by AVG Free Edition. <br>
Version: 7.5.488 / Virus Database: 269.14.6/1059 - Release Date:
10/9/2007 08:44</blockquote></body>
</html>