Originally Posted by
Pastor of Muppets
If a wing/aeroplane "doesn't care about the moving air mass" Why is windshear a big deal?
It cares about the moving air mass - that's what it's flying relative to. If the moving air mass suddenly changes its speed or direction, it cares about that too. It just doesn't care about the Earth, the Sun, the distant parts of the universe, or the fact that you've just flown over SHEED and are turning into a northerly to land at Melbourne.