Full rudder deflection is limited above what KIAS?

The full rudder deflection in the T-6A is limited above 150 KIAS to prevent adverse aerodynamic effects that can occur at higher speeds. At elevated airspeeds, the control surfaces become more effective and their responses can lead to undesirable yaw or roll reactions. Limiting rudder deflection helps maintain control authority and prevents the risk of structural damage or loss of control that might result from excessive aerodynamic forces acting on the aircraft.

Understanding this limitation is essential for safe maneuvering and for operating the aircraft within its designed flight envelope. It highlights the importance of respecting speed limits during flight operations to ensure that pilots can maintain optimal control of the aircraft.