Originally Posted by
Neverlost1
The increased energy comes from the moving air mass. This still has nothing to do with the aircraft flying through that same air mass loosing or gaining altitude in a turn. It only makes a difference when you hit the ground at full throttle. Your crash will be more impressive with the wind than against it due to the increased momentum :-)
If the energy comes from the moving air mass then that means the air speed must change. But everyone agrees there cannot be a change in airspeed