What is the main purpose of hydraulic pressure in the landing gear system?

The primary function of hydraulic pressure in the landing gear system is to actuate mechanisms that are crucial for the extension and retraction of the landing gear. Hydraulic systems are employed in aircraft due to their ability to generate significant force from relatively small components, allowing for effective movement of heavy parts such as the landing gear. When the pilot activates the landing gear switch, hydraulic pressure is directed to the landing gear system, enabling the gear to deploy for landing or retract for flight. This efficiency and reliability in operation underscores the importance of hydraulics in ensuring safe and effective takeoff and landing procedures.

Other functions, such as providing electrical power, charging gas tanks, or cooling the engine, are not directly related to the operation of the landing gear and highlight the specialized role hydraulics play in aircraft systems.