Longeron
In engineering, a longeron or stringer is a load-bearing component of a framework.
The term is commonly used in connection with
Aircraft
In an aircraft fuselage, stringers are attached to
Sometimes the terms "longeron" and "stringer" are used interchangeably. Historically, though, there is a subtle difference between the two terms. If the longitudinal members in a fuselage are few in number (usually 4 to 8) and run all along the fuselage length, then they are called "longerons". The longeron system also requires that the fuselage frames be closely spaced (about every 4 to 6 in or 10 to 15 cm). If the longitudinal members are numerous (usually 50 to 100) and are placed just between two formers/frames, then they are called "stringers". In the stringer system the longitudinal members are smaller and the frames are spaced farther apart (about 15 to 20 in or 38 to 51 cm). Generally, longerons are of larger cross-section when compared to stringers. On large modern aircraft the stringer system is more common because it is more weight-efficient, despite being more complex to construct and analyze. Some aircraft use a combination of both stringers and longerons.[4]
Longerons often carry larger loads than stringers and also help to transfer skin loads to internal structure. Longerons nearly always attach to frames or
Space launch vehicles
Stringers are also used in the construction of some
References
- ^ "Longeron". The Free Dictionary. Retrieved 2018-05-15.
- ^ "Pilot's Handbook of Aeronautical Knowledge". Federal Aviation Administration. August 24, 2016. Retrieved 16 January 2023.
- ^ V, Vignesh. "Reconnaisance [sic] aircraft design project".
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(help) - ^ Bruhn, E. F (1973). Analysis and Design of Flight Vehicle Structures (PDF). Tri-State Offset Company. p. C11.29.
- ^ Michael C. Y. Niu (1988). Airframe Structural Design (PDF). Conmilit Press LTD. p. 376.
- ^ "Falcon 9 Launch Vehicle Payload User's Guide, Rev 2" (PDF). 21 October 2015. p. 11. Archived from the original (PDF) on 14 March 2017. Retrieved 29 January 2016.