Full rudder deflection is limited above which KIAS?

Full rudder deflection in the T-6 Texan II is limited above 150 KIAS to maintain control of the aircraft and ensure flight safety. This limit is established to prevent structural strain and ensure the aircraft remains controllable during high-speed maneuvers. At excessive airspeeds, the aerodynamic forces on the rudder become significantly more substantial, which can lead to difficulties in managing the aircraft's yaw and roll, as well as potentially causing overstress to the rudder mechanism itself. Therefore, the limit at 150 KIAS allows pilots to use the rudder effectively without risking loss of control or damage to the aircraft.