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Interior of a Boeing/Stearman PT-17 showing small channel section stringers. In engineering, a longeron or stringer is a load-bearing component of a framework. The term is commonly used in connection with aircraft fuselages and automobile chassis. Longerons are used in conjunction with stringers to form structural frameworks. [1]
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.
The spar carries flight loads and the weight of the wings while on the ground. Other structural and forming members such as ribs may be attached to the spar or spars, with stressed skin construction also sharing the loads where it is used. There may be more than one spar in a wing or none at all.
These are each built up around a single spruce spar. Plywood covering and polyester-filled laminate ribs form a box spar forward to the leading edge , with spruce ribs and polyester covering aft. Since 2006 all composite parts have been replaced by carbon fibre castings.
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]
Cows have 13 ribs on each side. A prime rib is cut from the center section of these ribs, and consists of seven ribs in total. A full prime rib can be upwards of 30 pounds and is likely too big ...
Frame numbers are the numerical values given to the frames. Frame numbers typically begin at 1 with the forward-most frame for US-built ships, and typically begin at 0 with the transom for ships built elsewhere, with numbers increasing sequentially towards the stern or bow, respectively. The total number vary per the length of a ship.
The price of coffee rose more than 80% in 2024, according to The Wall Street Journal, surpassing a record set in 1977. And with concerns brewing about a weak 2025 harvest in Brazil, prices could ...