How does the landing gear retract during flight?

The landing gear retracts via hydraulic systems, which is the correct response. In modern aircraft, hydraulic systems are utilized because they provide the necessary force and control to move heavy components efficiently and safely. The hydraulic system allows for smooth operation during the retraction and extension of the landing gear, ensuring that the gear locks into place securely when in the extended position for landing and takeoff, and retracts cleanly into the aircraft structure during flight.

The design and implementation of hydraulic systems offer advantages such as weight savings compared to cable systems, as well as increased reliability and fewer required physical components, making hydraulic systems a preferred choice for the landing gear mechanism in many aircraft. Other systems, such as manual controls, would not be practical for this function, particularly in large commercial aircraft where automated systems enhance safety and performance.