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<DIV><FONT face=Arial size=2>Ahaaaa ! .................for the first time in all
these years I understand the reasoning of my good friend Ron Lockhart with
his swimming pool analogy, but,........there's a fly in the ointment
!!!!!!!!!!!! </FONT></DIV>
<DIV><FONT face=Arial size=2>Someone, maybe Nat, mentioned that air is a fluid.
I agree ! Moving air is a CURRENT ! In order for the swimming pool
analogy to equate to our situation of flying in a crosswind, the pool would need
to be converted into a hot tub with jets located all down one side and exhaust
outlets on the other side so that a cross CURRENT could be established
(same as the crossing CURRENT we're flying in ) whereupon the swimmer would
then be pushed to the exhaust side of the pool. He would certainly feel the
force of the current exerting a deleterious effect on his intended swimming
direction and would have to compensate and if he was in a boat with a rudder
(with forward propulsion) he would aquavane vectorially due to the combined
effect of the CURRENT and the forward propulsion. It will not make any
difference whether you pick the pool up and move it sideways, fore or aft, turn
it around, raise it, or lower it as long as the AC doesn't go out.
:>)</FONT></DIV>
<DIV><FONT face=Arial size=2>Who else,...me</FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<BLOCKQUOTE
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=ronlock@comcast.net href="mailto:ronlock@comcast.net">Ron
Lockhart</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 Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, October 13, 2007 10:46
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] (no
subject)</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>See comments at end of RJO post.</FONT></DIV>
<BLOCKQUOTE
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=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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