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The wing twist distribution is perhaps the least controversial design parameter to be selected. The twist must be chosen so that the cruise drag is not excessive.
WASHOUT - The terms 'wing twist' and 'washout' refer to wings designed so that the outboard sections have a lower ANGLE OF INCIDENCE, 3 or 4° or so, and thus lower AOA than the inboard sections in all flight conditions.
Others are wing planform (rectangular, tapered, etc.), wing tips, wing twist (we will discuss this topic, as it seems to be one that is frequently misunderstood or underestimated), wing aspect ratio, or span loading (which seems to be overestimated).
 See also: Cruise, Cross, Absolute, Separation, Accelerate
  
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