Best Rule of Thumb
When you're on short final and have about 10 seconds when the tower gives you the wind direction/speed, the best rule of thumb was:
For each 10 degrees of X-wind take one sixth (1/6) of the crosswind value.
eg landing on runway 04 with x-wind of 12 kts from 060
Wind = 20 degrees from right so 2/6 or 1/3 of 12 = 4 knots x-wind.
With a bit of practice you can do any permutation in your head in well under 5 seconds!!!
Last edited by er340790; 11th April 2008 at 18:21.