>   -- Positive elevator deflection creates a positive pitching moment,
>    positive around the +Y axis, i.e. nose up.

By the way, Cm_de (that is, pitching moment given an elevator
deflection) is nominally negative. So, you can see, a positive elevator
deflection results in a negative pitching moment. Likewise, Cn_dr is
negative (yawing moment given a rudder deflection). 

Jon

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