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What is the basic function of landing gear?

Landing gear is an accessory device used to support the aircraft and move the ground (water surface) when the aircraft takes off and lands or taxies on the ground (water surface). Landing gear is the only component that supports the whole aircraft, so it is an indispensable part of the aircraft; Without it, the plane can't move on the ground. When the plane takes off, the landing gear can be retracted according to the flight performance.

Landing gear device is an important bearing and control part of aircraft, which plays an extremely important role in the safe take-off and landing of aircraft. Landing gear is a necessary support system for takeoff, landing, taxiing, ground movement and parking of aircraft, and it is one of the main components of aircraft. Its performance is directly related to the safety of aircraft.