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<DIV><FONT face=Arial size=2>See comments at end of RJO post.</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=rjo626@aol.com href="mailto:rjo626@aol.com">rjo626@aol.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, October 13, 2007 4:55
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [NSRCA-discussion] (no
subject)</DIV>
<DIV><BR></DIV>
<DIV><WBR>The 010 track<BR>is caused not by a weathervane effect, but by the
body of air moving from<BR>west to east while airplane progresses<BR>through
it on north heading.<BR><BR>During this flight, (and in<BR>Case 1 and 2) a yaw
string would be straight, no wind hits side of airplane.<BR><BR>I'm missing
something here. The body of air moving from west to east is <BR>not hitting
the airplane? Then what makes it go off course? Please
explain.<BR>
RJO<BR></DIV>
<DIV>Comments-
</DIV>
<DIV>The airplane is carried along in the west to east movement of the body of
air.</DIV>
<DIV>Sort like swiming in north direction in a swimming pool.
And a big giant (wind) picked up the pool</DIV>
<DIV>and carried it in a west to east direction. You would
wind up going west to east, but would not</DIV>
<DIV>have been hit on your west side by water. You would still be
swimming north, so you would travel</DIV>
<DIV>north on account of your swimming (airplane airspeed) and at the same
time be carried east by</DIV>
<DIV>by the giant (wind)</DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Another way of looking at it - a non powered
balloon in the same body of air will be carried in the same west to east
direction, and same speed as the wind. If you were riding in the
balloon, you would feel zero wind, cause balloon is not moving in the body of
air. Your direction of movement over the ground will be same direction
and speed as the wind.</FONT></DIV>
<DIV><FONT face=Arial size=2>If balloon had a yaw string, it would point
straight down, same as it would if in no wind air, which means it would
not</FONT></DIV>
<DIV><FONT face=Arial size=2>be moving over ground.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV>This "wind doesn't hit the side of the airplane" discussion ignors
gusting wind, random turbulence, etc. that might momentarily "hit" the plane
and cause changes in heading, pitch and airspeed. They are relatively
short duration.</DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Later, Ron Lockhart</FONT></DIV>
<DIV> </DIV>
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