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<DIV>Nat,</DIV>
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<DIV>Very nice. Thanks,</DIV>
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<DIV class=signature id=signature>--<BR>Vicente "Vince" Bortone</DIV>
<DIV> </DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-------------- Original message -------------- <BR>From: "Nat Penton" <natpenton@centurytel.net> <BR>
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<DIV><FONT face=Arial size=2>Some of you guys covered the following in various ways.</FONT></DIV>
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<DIV><FONT face=Arial size=2>There is drag due to lift because the lift vector ( force ) is not perpendicular to the flight direction. Drag is a function of lift and that component of the lift vector in the flight direction is called induced drag.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Up, and down, both ailerons produce drag, but in unequal amounts if the wing is in lift mode. The difference in drag for pattern airplanes is small because of low wingloading ( low AOA ).</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The symmetrical airfoil plays a role in keeping the drag differential low because, to generate equal lift , upright to inverted, requires a different AOA for the non-symmetrical section.</FONT></DIV>
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<DIV><FONT face=Arial size=2>What did I forget? Nat</FONT></DIV></BLOCKQUOTE></body></html>