Proportional aerodynamic control/Definition

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Proportional aerodynamic control [r]: The form of flight control used on aircraft and advanced missiles, in which there is a continuous range of motion of the control surfaces, so that movements of the yoke or joystick, or equivalent in the flight computer, can produce a corresponding control surface deflection throughout the range from minimum to maximum; contrast with bang-bang control in which the control surface is either deflected or not