The wheels and attached structures under an airplane that support it and allow it to move when on the ground; also, the floats or pontoons of an amphibious airplane together with their supporting structures. Landing gear may be fixed rigidly in place, or retractable when in flight.
Another word for undercarriage. The collection of devices including wheels, skis, and floats that enable a flight vehicle to land and move about on land, water or other surfaces. The landing gear is often retractable - it can be pulled into the fuselage of the aircraft to reduce drag during flight.
also called the undercarriage. Refers to all wheels and associated bits. Landing gear can be fixed or retractable up into the underside of the wing (called 'retracts', usually only on models with 5 channels or more).