Methods and apparatus for enhancing aircraft flight control surface effectiveness via forced oscillation are described. An example control system of an aircraft includes a flight control surface, an actuator, and one or more processors. The actuator is configured to move the flight control surface. The one or more processors are configured to determine a current position of the flight control surface. The one or more processors are further configured to determine whether the current position exceeds a position threshold. The one or more processors are further configured to generate a forced oscillation signal in response to determining that the current position exceeds the position threshold. The one or more processors are further configured to command the actuator to move the flight control surface based on the forced oscillation signal.