I agree with TR completely but you dont have to get too bogged down in numbers. Depending on what you fly (ie: your TAS) you only have top learn 1 set of figures.
Max Drift (MD) = 60/TAS x wind velocity (WV)
So, if you fly a C206 @ 120kts, your MD will always be 0.5 x WV
(or for me @ 480kts it is always wind velocity 1/8th of the WV)
From there....as detailed above, multiply your MD but the SINE of the wind angle:
Here are some easy to remember SINE numbers: (sames as the clock-code method really)
10deg = 0.1
20deg = 0.3
30deg = 0.5
40deg = 0.6
50deg = 0.7
60deg = 0.8
70deg = 0.9
abv 70 = 1.0
Now you can really bore people at parties!!
