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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]
Marcel bloch formed Société des Avions Marcel Bloch in 1929, the company's first project was the MB.60 3-engined commercial transport aircraft. Built entirely of light alloys with steel for high strength fittings, the MB.60 introduced several new techniques, including rivetting external stringers and longerons to skin sheets before attachment to ribs and frames; delivering a robust light ...
The "former-and-longeron" technique (also called stations and stringers) was adopted from boat construction, [2] and was typical of light aircraft built until the advent of structural skins, such as fiberglass and other composite materials. Many of today's light aircraft, and homebuilt aircraft [3] in particular, are still designed in this way.
The fuselage of the Type IV was built around six spruce longerons with stringers, formers and poplar plywood skinning but no internal cross-bracing producing a semi-monocoque structure. Its engine was a 450 hp (340 kW) Lorraine-Dietrich water-cooled W-12 with a Lamblin radiator mounted transversely under it.
Beyond the initial D.33 model, further derivatives of the aircraft were produced; there were three major variations to the type, each of which was designed as a separate aircraft. Largely due to the record breaking performance achieved, this line of aircraft were highly regarded and attracted considerable commercial interest throughout the ...
The tail boom uses conventional semi-monocoque construction, supported by closely spaced notched channel-section frames and continuous stringers, absent of any major longitudinal sections or longerons. The cranked section carrying the tail rotor and trim plane is more robust, strengthened by a solid-web spar, frames, and stiffeners. [7]
Food poisoning, also known as foodborne illness, is a common sickness caused by swallowing food or liquids that contain harmful bacteria, viruses or parasites, and sometimes even chemicals.
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 ...