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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 front fuselage was built on four tubular longerons, but from leading edge rearwards it consisted of a set of oval formers with stringers. [1] The greatest novelty of the P.10 was that this part of the fuselage was not only a monocoque structure (still fairly unusual at the time), but a monocoque of steel with a load-bearing plastic skin ...
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.
Data from Boulton Paul Aircraft since 1915, The British Bomber since 1912 General characteristics Crew: 3 Length: 39 ft 9 in (12.12 m) Wingspan: 62 ft 6 in (19.05 m) Height: 15 ft 8 in (4.78 m) Wing area: 925 sq ft (85.9 m 2) Gross weight: 8,914 lb (4,043 kg) Powerplant: 2 × Napier Lion water-cooled W12 engine, 450 hp (340 kW) each Performance Maximum speed: 112 mph (180 km/h, 97 kn) at sea ...
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.
The CLA.2 was the first aircraft completed by the Cranwell Light Aeroplane (CLA) club, formed in 1923 by staff and students at the RAF College Cranwell. The students came from No.4 Apprentices Wing and one of their lecturers, Flt-Lt Nicholas Comper , became chief designer of the three aircraft produced by the club as well as one, the CLA.1 ...
A typical metal spar in a general aviation aircraft usually consists of a sheet aluminium spar web, with L- or T-shaped spar caps being welded or riveted to the top and bottom of the sheet to prevent buckling under applied loads. Larger aircraft using this method of spar construction may have the spar caps sealed to provide integral fuel tanks.