Originally Posted by
jackal
The other major factor affecting headwind/tailwind performance stems from the propulsion method aircraft use: pushing air. For every increment of headwind, an equal increment of thrust is reduced. A 100mph headwind means that the thrust force of the aircraft is reduced by 100mph, and the aircraft will travel 100mph slower.
No, the thrust remains the same, and the airspeed remains the same. The groundspeed is, of course reduced by 100mph, but not by the means you describe.