TimTaylor wrote:FastEddie, you are correct but have an over-simplified understanding of the situation. You are ignoring the effects of momentum (energy) of the aircraft that must be overcome, especially if the turn is quick.
It’s momentum relative to what? The air mass or the ground?
You’re walking down the aisle of a train moving at a constant speed of 60 mph. You stumble and fall. Is it relevant to your injury likelihood whether you’re walking in the direction the train is moving or in the opposite direction?
In the case of a plane, the only thing that matters is its momentum relative to the air mass. In a 60 kt wind, a 100 kt plane could be moving over the ground at 40 kts into the wind or 160 kts flying downwind. In both situations the “lift” and stall likelihood are identical. The plane has no way of knowing what the ground is doing*. In your scenario, something would change momentum-wise if the plane started doing 360’s in that wind as the groundspeed went from 40 kts to 160 kts. It doesn’t. Under a hood you could not feel anything different from doing the same 360’s in still air.
Back to the ICON, as it made the right turn in an airmass moving left to right in the video, it would behave exactly as it would in still air. A wing does not know or care what the ground - or water - below it is doing.
*The only way to determine what the plane is doing relative to the ground is via navigation sources - or to look.