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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.
Nose section Center section Example 717, 727, 737: 6 wheels [1x2]+[2x2] A Boeing 737 from Southwest Airlines: 747: 18 wheels [1x2]+[4x4] 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 ...
China Airlines Flight 006 was a daily non-stop international passenger flight from Taipei to Los Angeles International Airport.On February 19, 1985, the Boeing 747SP operating the flight was involved in an aircraft upset accident, following the failure of the No. 4 engine, while cruising at 41,000 ft (12,500 m).
Wheel-well stowaways have been widely covered in the press and media at large throughout the history of passenger airlines.One of the most notable incidents involved Keith Sapsford (14) from Sydney, Australia, who fell 200 feet (60 m) to his death from the wheel-well of a Tokyo-bound Japan Air Lines Douglas DC-8 on February 24, 1970, shortly after takeoff from Sydney Kingsford Smith Airport.
An oleo strut is a pneumatic air–oil hydraulic shock absorber used on the landing gear of most large aircraft and many smaller ones. [1] This design cushions the impacts of landing and damps out vertical oscillations.
Krueger flaps deployed from the leading edge of a Boeing 747 (top left and right in photo). Krueger flaps, or Krüger flaps, are lift enhancement devices that may be fitted to the leading edge of an aircraft wing. Unlike slats or droop flaps, the main wing upper surface and its leading edge is not changed. Instead, a portion of the lower wing ...
A nose-over accident with Polikarpov I-15 bis A replica World War 1 F.E.2 fighter. This aircraft uses a tailskid. The small wheel at the front is a safety device intended to prevent nose-over accidents. The conventional landing gear arrangement has disadvantages compared to nosewheel aircraft. [2]
N747PA was completed on February 28, 1969. Originally registered as N732PA, it was re-registered to N747PA early on. The aircraft was used by Boeing for flight testing before being delivered to Pan Am, which immediately sent it out on an extensive promotional tour across the United States and the rest of the world to showcase the 747 to the public.