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English: Landing gear of an aircraft, schematic view of the retracting mechanism. Filled circles are fixed relative to the airframe. Coloured arcs denote the locus of points. 1 Hydraulic Ram 2 Hinge Mechanism 3 Strut 4 Wheel Boss 5 Wheel . 6 Fuselage/Wing
Example 2 wheels, 1 axle: Airbus A380 nose landing gear (consisting of a single 2-wheel bogie) 4 wheels, 2 axles: An Airbus A330's main landing gear (consisting of two 4-wheel bogies) 6 wheels, 3 axles: A Boeing 777's main landing gear (consisting of two 6-wheel bogies) 14 wheels, 7 axles
Schematic of the actuator mechanism for an aircraft landing gear. In engineering, a mechanism is a device that transforms input forces and movement into a desired set of output forces and movement.
The landing gear represents 2.5 to 5% of the maximum takeoff weight (MTOW) and 1.5 to 1.75% of the aircraft cost, but 20% of the airframe direct maintenance cost. A suitably-designed wheel can support 30 t (66,000 lb), tolerate a ground speed of 300 km/h and roll a distance of 500,000 km (310,000 mi) ; it has a 20,000 hours time between overhaul and a 60,000 hours or 20 year life time.
The hydraulic system is also used to extend and retract landing gear, operate flaps and slats, operate the wheel brakes and steering systems. Hydraulic systems consist of engine driven pumps, fluid reservoirs, oil coolers, valves and actuators. Redundancy for safety is often provided by the use of multiple, isolated systems. [3]
An arresting gear, or arrestor gear, is a mechanical system used to rapidly decelerate an aircraft as it lands. Arresting gear on aircraft carriers is an essential component of naval aviation, and it is most commonly used on CATOBAR and STOBAR aircraft carriers. Similar systems are also found at land-based airfields for expeditionary or ...
A Chicago-bound Boeing 747 cargo plane bound for Chicago returned to the runway shortly after take-off when its landing gear failed to retract.
Conventional landing gear, or tailwheel-type landing gear, is an aircraft undercarriage consisting of two main wheels forward of the center of gravity and a small wheel or skid to support the tail. [ 1 ] [ 2 ] The term taildragger is also used.