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<DIV><FONT size=2>OK, here's my thoughts on heading and track. They are
very different terms. Track is the path of the model over the
ground. Heading is the direction the nose is pointed. With no wind,
heading and track are the same. The downgrades for some turnaround
maneuvers are absolutely incorrect when there is the statement, "Model heading
does not finish exactly opposite direction of entry." </FONT></DIV>
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<DIV><FONT size=2>Let's take an example:</FONT></DIV>
<DIV><FONT size=2>Say the course parallel to the flight line is north-south (360
or 180 degrees). Assume the 180 degree heading is from left to
right. With no wind, if the model is flying parallel to the flight line
the heading and track will be 180 degrees from left to right. Now assume an in
blowing wind that requires a 15 degree correction to maintain a path parallel to
the flightline. Remember the track of the model must be wind corrected to
track parallel to the judges. The heading is now 165 degrees but the track
is 180 degrees. The model is crabbed into the wind 15 degrees with the
wings level as required by our regs and the nose is pointed away from the
pilot. Now assume you do a half loop as a turnaround. The opposite
heading to 165 degrees is 345 degrees. And that heading points the
model into the flightline not away as would be required for wind
correction. How many judges would award a perfect score if the model was
pointed into the flightline when an opposite correction was required?
These mis-stated downgrades in the regulations have been ignored for years (at
least I hope they have). Substitute track for heading and the model is now
required to exit the half loop on an exact opposite track. In other words,
parallel to the flightline entering the maneuver and parallel to the flightline
on exit.</FONT></DIV>
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<DIV><FONT size=2>Don</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV>
<DIV><FONT size=2>PS: On all modern jetliners the NAV display has pointers for
both heading and track and they are seldom the same in the air.</FONT></DIV>
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