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Old 2nd Aug 2010, 09:53
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Anonystude
 
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It does, on a still night. From memory -- when I was last night flying at an inland airfield -- we had something like 210/10 at surface, 270/40 at a couple of thousand feet. The problem is the surface friction causing the wind speed to reduce, reducing in turn the magnitude of the Coriolis force (which is something like 2 x wind velocity x angular velocity of rotation...).

I think!
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