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Some of the forces acting on a wing spar are: [2] Upward bending loads resulting from the wing lift force that supports the fuselage in flight. These forces are often offset by carrying fuel in the wings or employing wing-tip-mounted fuel tanks; the Cessna 310 is an example of this design feature.
While internal wing structure commonly provides much of the strength via a combination of spars, ribs and stringers, the external skin typically carries a proportion of the loads too. On many aircraft, the inner volume of the wingbox has also been used to store fuel, which is commonly referred to as being a wet wing design. [1]
They are primarily responsible for transferring the aerodynamic loads acting on the skin onto the frames and formers. In the wings or horizontal stabilizer, longerons run spanwise (from wing root to wing tip) and attach between the ribs. The primary function here also is to transfer the bending loads acting on the wings onto the ribs and spar.
Wing ribs of a de Havilland DH.60 Moth. In an aircraft, ribs are forming elements of the airframe structure of a wing, especially in traditional construction.. By analogy with the anatomical definition of "rib", the ribs attach to the main spar, and by being repeated at frequent intervals, form a skeletal shape for the wing.
One promising approach that could rival slats are flexible wings. In flexible wings, much or all of a wing surface can change shape in flight to deflect air flow. The X-53 Active Aeroelastic Wing is a NASA effort. The adaptive compliant wing is a military and commercial effort. [7] [8] [9]
The wing of the Vickers Viscount used a single main spar made up of a centre section in the fuselage, two inner sections and two outer sections. The main spar comprised an upper boom, a shear web and a lower boom. The aircraft was designed and type-certificated to the principle of a safe-life. Before a component reaches its safe-life it must be ...
Composite materials are used extensively throughout the A350. The Airbus A350 XWB is built of 53% CFRP [21] including wing spars and fuselage components, overtaking the Boeing 787 Dreamliner, for the aircraft with the highest weight ratio for CFRP, which is 50%. [22] This was one of the first commercial aircraft to have wing spars made from ...
Instead, the false spar that carrying the aileron was used to brace the outer-most wing elements, such as the wing tips. This false spar was at a pronounced angle to that of the main spar, thus triangulating the structure; the former ran inwards from the wing tips, where they are attached to the main spars, to the final compression members of ...