bluedonk, hell yeah, what the
did you know ? ?
deptrai, yep, it is not an easy one, not at all, particularly when flying (lets say) South of Spain to North of Norway ,+25/-25 is possibly the extremes, but, if we look worldwide in LH operation that is probably chickenfeed, but it is a problem, like aerodynamic deterioration after de-icing, that has been conveniently "ignored" for decades.)