pat, Wind direction, strength and variability is usually assessed by observing the airfield windsocks, which indicate the direction and variability and provide some idea of the surface speed. Indication of wind speed will vary with the type of windsock. A common type indicates a speed of 15 knots or greater when it is horizontal and about 7 or 8 knots when drooping at 45�.
cheers Baron Carter -----Original Message----- From: Pat Naughtin [mailto:[EMAIL PROTECTED]] Sent: Wednesday, 17 July, 2002 20:07 To: U.S. Metric Association Subject: [USMA:21206] Windsocks Dear All, Can anyone direct me to a source that will tell me how to use a windsock to estimate wind speed. I read something about this years ago � but I have since forgot. Thanks, Pat Naughtin CAMS Geelong, Australia
