Some of the old/bold treated the FD with some suspicion They used to tell a story about Ron Hardy, BMIs much respected chief pilot, who always did his checks with the most junior instructor in the fleet. As an engine failure at V1 = 1 knot happened and there seemed little input from him except a couple of tweaks to the trimmers, the instructor leant forward and said "follow the command bars captain", Ron pushed his seat back removed his hands and feet from the controls and watched. The sim ran along the runway rotated and climbed away. Ron turns to the instructor and says see what I mean?. These, points to shoulder, are command bars, they are advice bars