10 kts. Tailwind=20% additional landing distance (acc. AFM, additional landing distance varies between 17-20% (OAT, landing weight); 20% being the upper limit). We use the 20%-rule to do a quick maths when we get the
current wind by the tower (checking against the wind received in the ATIS).
Last edited by Cecco; 2nd Oct 2012 at 22:27.