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Old 12th Mar 2005, 22:08
  #27 (permalink)  
Mad (Flt) Scientist
 
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Well, there's a bit of a difference opinion here

But my answer is "no". The wing and tail setting angles are primarily cruise performance issues; there are other criteria, but the goal will be to get an efficient cruise condition. Of course, whether it's high or low speed cruise, the weight and so forth will affect the actual practical implications. If the designers are working with an optimistic weight forecast, using quite high cruise speeds and perhaps relatively short missions (hence low fuel weights) they'll end up with a relatively low incidence for the wing. If the actual aircraft comes out heavier and thristier, AND if operators tend to fly at lower cruise speeds for economic reasons, then you'll end up with more lift needed in cruise than was expected, and so higher deck angles.
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