What happens to the trim system after takeoff trim has been set?

After takeoff trim has been set, the trim system's function is designed to ensure that the aircraft maintains stable flight without requiring continuous pilot input. In this context, once the initial takeoff trim is set, the system will make no further adjustments until the aircraft accelerates above a specified speed, which in this case is 80 knots indicated airspeed (KIAS).

At lower airspeeds, particularly below this threshold, the trim system remains inactive to prevent unnecessary adjustments that could lead to destabilization during critical phases of flight shortly after takeoff. This operational characteristic is particularly important for safety and control, allowing pilots to focus on managing the aircraft's ascent without concerns over automated trim changes that could complicate an already dynamic situation.

Thus, understanding this aspect of the trim system's functionality is crucial for effective flight management in the T-6A and helps pilots anticipate the behavior of the aircraft as it transitions from the takeoff phase to steady flight.