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Advisory Circular 150/5345-27D

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Dennis Thate

Joined: 18 Nov 2010
Posts: 362

Posted: Fri Nov 04, 2011 2:06 pm Post subject: Advisory Circular 150/5345-27D

Thanks for your inquiry.  The standard for windsocks is found in FAA Advisory Circular 150/5345-27D.  This says the windsocks have to indicate the proper direction at wind speeds as low as 3 knots and the windsock is supposed to stand straight out at speeds between 14 and 17 knots.  



When we changed vendors we made some observations of the competing windsocks.  I don’t think you can really judge the wind speed by looking at the windsock, but you can get a pretty good idea of the direction. 



Mn/DOT



651.226.2043

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