As to the wind...well, asked my QFI that too and the answer was straightforward...its not an issue because you will even out fuel useage during the navex...ie on the southward leg we may have a tailwind...therefore use less fuel...so use more fuel on northward leg back home due to the headwind but we have more anyway because we used less than calculated because of the tailwind on the outward leg - seems logical to me! Groundspeed? I'll have to ask about that one!
Is nonsense as
keith williams has said!
Think of the extreme case of a 100 kt wind....
