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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]
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 British ARV Super2 light aircraft has a fuselage constructed mainly of aluminium alloy, but with some fibreglass elements. The cockpit is a stiff monocoque of "Supral" alloy, but aft of the cockpit bulkhead, the ARV is conventionally built, with frames, longerons and stressed skin forming a semi-monocoque.
The EC.4 had a conventional undercarriage with cantilever main legs hinged on the lower longerons, rubber sprung inside the fuselage. [1] The second design, the ED.5 was similar to the EC.4 except that it was a metal aircraft. The forward part of the wing and the whole fuselage were constructed in a process also patented by Béchereau.
The P.10 was not the first metal British aircraft, for the unlikely looking Seddon Mayfly holds that priority; but it never had a realistic hope of flight. [1] One lesser novelty, which was to become a standard Boulton & Paul feature was the mounting of the Lucifer on a hinge so that it could be swung sideways for servicing without ...
In concept the aircraft was a monoplane version of the biplane Hansa-Brandenburg W.12, although there were many structural differences between the two. Some examples were turned over to the victorious Allies for evaluation, although only the Imperial Japanese Navy ordered copies into production which remained in service until the early 1930s.
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Stringer (aircraft), or longeron, a strip of wood or metal to which the skin of an aircraft is fastened; Stringer (slag), an inclusion, possibly leading to a defect, in cast metal; Stringer (stairs), the structural member in a stairway that supports the treads and risers; Stringer (surfing), a thin piece of wood running from nose to tail of a ...