Thread: New Product Xplorer/NAN models
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Old Jan 26, 2009, 10:27 AM
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United States, CA, Midway City
Joined Dec 2003
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Ah, I found it!
Quote:
Originally Posted by markdrela
Aileron differential uses drag to create a yaw moment, while the rudder uses lift. By definition, a drag force sucks energy from the glider, while a lift force does not.

The lift force on the rudder does have some associated profile and induced drag. But for a given yaw moment, this additional drag on a typical rudder is much smaller than what's required on the upward-deflected aileron. Increasing the aspect ratio of the vertical tail makes it even better in this regard.
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