Revisit the initial problem statement:

Notice the control system tracks the plane's speed. Not the wheel's speed, but the plane.

Nobody gives a rat's arse about the wheel speed; only the Plane's speed. So any suggestion/description that's based on what the wheels are doing at the time is irrelevent. The Plane is moving (speed) in order for the conveyor belt to move.

Whether the plane has wheels, floats, skids, or freaking hovers over top of the conveyor is of no consequence to the solution to the problem question.