Hi.
Speaking as a 35 hour ppl student here so you`ve been warned! The advice I have been given is to take the angle of of the wind from your track and add 20 and that is the %age crosswind. This doesn`t work for a 90 degree xwind as in your example (110% xwind conponent!) but works well with smaller angles.
EG landing rw 27 wind is 240/30: angle is 30 degrees of the rw hdg, therefore 30 + 20 = 50% of the wind as an xwind so 15 knots.
It`s far from perfect but works well for moderate angles. For 30 degrees only it is exact, as sine 30 is 0.5
Cheers
James
Originally Posted by ToPocHi
I bear a question that may seem silly and simple to many. However, I still am a cadet and my instructor requires me to figure the application out myself (and obviously, I'm unsure of the actual application). I hope that this question isn't too frivolous for you gentlemen. Let's have an example question: You're coming in for a finals approach, landing at 70 knots, RW27 with a crosswind component of 180/25. How would you go about in applying the rule of thumb, if any. Thank you gentlemen for your time.