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The profile drag of a streamlined object held<br />
in a fixed position relative to the airflow increases<br />
approximately as the square of the velocity;<br />
thus, doubling the airspeed increases the drag four times,<br />
and tripling the airspeed increases the drag nine times.<br />
The amount of induced drag varies inversely<br />
as the square of the airspeed.<br />
From the foregoing discussion, it can be noted that parasite drag increases<br />
as the square of the airspeed, and induced drag varies inversely as<br />
the square of the airspeed.<br />
lift varies directly with the wing area<br />
a wing with a planform area of 200 square feet lifts twice as<br />
much at the same angle of attack as a wing with an area of 100<br />
square feet.<br />
http://www.americanflyers.net/aviationlibrary/pilots_handbook/chapter_3.htm<br />
Image from FAA pilot handbook and http://www.youtube.com/watch?v=8uT55aei1NI<br />
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