Coupled Ailerons and Rudder: The coupling of ailerons and rudder refers to the design of aircraft control surfaces that are connected with interconnected springs to counteract adverse yaw. Adverse yaw is a tendency of an aircraft to yaw in the opposite direction of its bank. When an aircraft is banked, the lift generated by the wings creates more drag on the wingtip that is down relative to the wingtip that is up, which causes the aircraft to yaw in the opposite direction of the bank. Coupled ailerons and rudder work together to correct this yaw and maintain coordinated flight. The rudder is deflected in the same direction as the ailerons to counteract adverse yaw and keep the aircraft coordinated. This coupling can be overridden if it becomes necessary to slip the aircraft, which is a technique used to increase the rate of descent or lose altitude rapidly without gaining speed. Overall, coupled ailerons and rudder are an important part of an aircraft’s control system, ensuring safe and stable flight by correcting adverse yaw.
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