Boeing 747-8 instance of aircraft model
Design
The 747-8 is a development of the Boeing 747 that takes advantage of improvements in technology and aerodynamics. The two 747-8 variants feature a fuselage stretch of 18.3 ft (5.6 m) over the 747-400, bringing the total length to 250 ft 2 in (76.25 m). The 747-8 is the world's longest currently-operational passenger airliner, surpassing the Airbus A340-600 by 3.1 ft (0.95 m).  With a maximum take-off weight of 975,000 lb (442 t), the 747-8 is the heaviest aircraft, commercial or military, manufactured in the U.S.Compared to the preceding 747-400, the wing design was overhauled. The sweep and basic structure were retained, avoiding additional costs, but the revised airfoil is thicker and deeper. The new wing features single-slotted outboard flaps and double-slotted inboard flaps. The wing's trailing edge and raked tip are made of carbon-fiber composites. The increased wingspan makes the 747-8 a Category F size airplane rather than Category E size, similar to the Airbus A380.
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