Apologies to anyone with a pilot’s licence or knowledge of aerodynamics.
To everybody else on this thread please listen;
Ground speed is only relevant to an aircraft when you come into contact with the ground (or want to know at what time you will arrive at your destination)
Air is a fluid medium. Whilst airborne air speed is the key to staying there.
When assessing student pilots grasp of this concept I used to ask them a simple question; The wind is 270 degrees at 20 kts and I release a helium filled toy balloon, where will it be in one hour?
During instrument training the mantra is “believe your instruments but keep the scan going” in other words; don’t fixate on one, the primary instruments will tell you everything you need to know. Do not believe your senses, spatial disorientation will kill you.
One other thing I used to teach was APT (Attitude Power Trim)