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Aircraft utilizing three or more spars are considered multi-spar aircraft. Using multiple spars allows for an equivalent overall strength of wing, but with multiple, smaller, spars, which in turn allow for a thinner wing or tail structure (at a cost of increased complexity and difficulty of packaging additional equipment such as fuel tanks ...
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.
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.
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]
The aircraft is constructed with fabric covered 4130 steel tube structure and spruce wing spars. Ribs are plywood with cap strips. Ribs are plywood with cap strips. [ 1 ]
The Akro is a cantilever mid wing monoplane with a wooden, two spar mahogany skinned wing built in one piece, its forward spar passing unbroken through the fuselage and the rear spar in two parts. The plain, statically balanced ailerons have steel spars with spruce ribs and trailing edges ; they are fabric covered and carry ground adjustable ...
The Avid Flyer is a conventional layout, single engine, side by side two seat light aircraft, with a strut-braced high wing configuration. Aluminum tubes serve as leading edge/main spar and rear spar, each wing being supported by a pair of tubular lift struts. Sawn plywood wing ribs are bonded to the aluminum tube spars using a filled epoxy ...
Support for the intermediate ribs came for a pair of strips that ran parallel to the spars. Due to the wing's relatively thick profile, both the upper and lower flanges were independent of one another and functioned as a continuous girder. [1] In the thinner areas of the wing, the ribs were strengthened with a lattice structure.