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How do aircraft know wind speeds? (Read 241 times)
Dec 10th, 2011 at 8:50am
Dave71k   Ex Member

 
On the default 737 and a321s etc they have a wind speed and direction reading on the PFD.

How do the aircraft work out wind speed and direction when they them selves are moving?


 
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Reply #1 - Dec 10th, 2011 at 8:55am
Faildozer.   Ex Member

 
I presume computers get the velocity relative to the air (from indicated airspeed and heading), then compare that with the ground velocity (from GPS etc).
 
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