Which of the following mechanical methods is used to actuate flight control systems?

Cables are a traditional and widely used mechanical method for actuating flight control systems in many aircraft. The use of cables in control systems leverages direct physical connections to transfer pilot input from the control surfaces (like the yoke or control stick) to the flight control surfaces (such as ailerons, elevators, and rudders).

This method relies on a series of pulleys and linkage systems that translate the mechanical movements directly. Cables are appreciated for their simplicity, reliability, and weight efficiency, making them an excellent choice for smaller or less complex aircraft where precise control is essential.

While hydraulics, pneumatics, and electric motors each play vital roles in modern aviation, particularly in larger or more advanced aircraft systems, they represent different technologies that provide actuation through fluid pressure or electrical signals rather than direct mechanical linkages.