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A Boeing 747-400's main landing gear. Note the toes-up bias angle of the bogies on the wing gear, to ensure correct stowage upon retraction: 707, 720, 757, 767, 787: 10 wheels [1x2]+[2x4] A Boeing 757-200 from British Airways: 777: 14 wheels [1x2]+[2x6] A Boeing 777-200 from United Airlines.
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.
Droop flaps function with other high-lift devices on an aircraft to increase the camber of the wing and reduce the stalling speed.On the Airbus A380, the first stage of lift device selection deploys the droop flaps (called droop noses by Airbus) and leading-edge slats located further out on the wing; with the main flaps starting to extend when the second stage is selected.
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.
Maximum landing gear extended speed. This is the maximum speed at which a retractable gear aircraft should be flown with the landing gear extended. [7] [8] [9] [20] V LO: Maximum landing gear operating speed. This is the maximum speed at which the landing gear on a retractable gear aircraft should be extended or retracted. [7] [9] [20] V LOF ...
Flaps during ground roll after landing, with spoilers up, increasing drag. North American T-6 trainer, showing its split flaps Flaps may be fully extended for landing to give the aircraft a lower stall speed so the approach to landing can be flown more slowly, which also allows the aircraft to land in a shorter distance.
The A380 is offered with the Rolls-Royce Trent 900 (A380-841/-842) or the Engine Alliance GP7000 (A380-861) turbofan engines. [153] The Trent 900 is a combination of the 3 m (118 in) fan and scaled IP compressor of the 777-200X/300X Trent 8104 technology demonstrator derived from the Boeing 777's Trent 800 , and the Airbus A340-500/600's Trent ...
A United Airlines flight from San Francisco to Mexico City was diverted to Los Angeles Friday after an issue with the plane’s hydraulic system, the airline said.