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Soudage des longerons
Soudage des longerons
Published: 2007/08/06
Channel: 4lovent
Fabrication longeron
Fabrication longeron
Published: 2012/11/06
Channel: projetaquilon
Portes Ouvertes du CPIR Le Longeron
Portes Ouvertes du CPIR Le Longeron
Published: 2017/09/10
Channel: Alvin Le Guelvouit
Longeron Meaning
Longeron Meaning
Published: 2015/04/24
Channel: SDictionary
Aircraft Construction
Aircraft Construction
Published: 2016/06/05
Channel: Will Liebhaber
Première Communion - 21 Mai 2017 - Le Longeron
Première Communion - 21 Mai 2017 - Le Longeron
Published: 2017/05/28
Channel: Communication Paroisse Saint Romain
Longeron complete, cockpit started: Blog 70
Longeron complete, cockpit started: Blog 70
Published: 2016/09/26
Channel: rv12uk
Les Couzind d
Les Couzind d'octave - Au Longeron
Published: 2014/06/01
Channel: Jeremie Badreau
Le déversoir du Longeron
Le déversoir du Longeron
Published: 2013/01/31
Channel: Marc Lhormel
car longeron painting
car longeron painting
Published: 2015/10/07
Channel: FruktsGarage
Longeron - Rosehill - 5th
Longeron - Rosehill - 5th
Published: 2014/02/02
Channel: 5frogz
Créa Composite au Longeron
Créa Composite au Longeron
Published: 2015/03/16
Channel: CCI de Maine et Loire
Cavité pour longeron d
Cavité pour longeron d'aile
Published: 2013/04/25
Channel: 84npor
Loik Longeron - Some Clips
Loik Longeron - Some Clips
Published: 2015/05/20
Channel: Nicolas Laugier
Rest! Odessa Longeron
Rest! Odessa Longeron
Published: 2017/08/13
Channel: ivdan 22
Patrick Richard au Longeron
Patrick Richard au Longeron
Published: 2015/01/02
Channel: François Féat
Longeron - Back to Back wins
Longeron - Back to Back wins
Published: 2013/06/16
Channel: 5frogz
Left longeron Subaru Forester III 2009
Left longeron Subaru Forester III 2009
Published: 2016/05/24
Channel: Иван Манилов
Mannequin Challenge des Sapeurs Pompiers du LONGERON
Mannequin Challenge des Sapeurs Pompiers du LONGERON
Published: 2017/01/09
Channel: Alvin Le Guelvouit
Loïk Longeron | Roller Edit
Loïk Longeron | Roller Edit
Published: 2014/10/22
Channel: Nicolas Laugier
Décasport Le Longeron 2015 - épreuve VTT
Décasport Le Longeron 2015 - épreuve VTT
Published: 2015/07/14
Channel: Benoît Dixneuf
Hôtel Le Longeron
Hôtel Le Longeron
Published: 2013/06/21
Channel: Mike Elmont
Essai de longeron de Luciole MC30
Essai de longeron de Luciole MC30
Published: 2011/12/08
Channel: conceptionaero
DECOUPE AMES LONGERON PLAN FIXE
DECOUPE AMES LONGERON PLAN FIXE
Published: 2017/02/01
Channel: matthieu Barreau
"The Raven" Skybolt Episode 2 Longeron Replacement Splice
"The Raven" Skybolt Episode 2 Longeron Replacement Splice
Published: 2017/02/27
Channel: Austin Daniel
Alfa type 105. Déformation du longeron en bout du boitier de direction
Alfa type 105. Déformation du longeron en bout du boitier de direction
Published: 2015/06/21
Channel: Serge Masriera
Les Couzins d
Les Couzins d'octave - au Longeron
Published: 2014/06/01
Channel: Jeremie Badreau
Les Couzins d
Les Couzins d'octave - au Longeron
Published: 2014/06/01
Channel: Jeremie Badreau
Longeron win in Sale
Longeron win in Sale
Published: 2013/06/14
Channel: 5frogz
Remorque Rocca a réparer Besoin d
Remorque Rocca a réparer Besoin d' un longeron et de trois galets
Published: 2016/09/30
Channel: ANTOMICOU FISHING
Longerons-2-production.flv
Longerons-2-production.flv
Published: 2012/02/05
Channel: BlueSwallowAircraft
Longeron @ Flemington over 1700m
Longeron @ Flemington over 1700m
Published: 2013/07/20
Channel: 5frogz
Bike and run Le Longeron 2014
Bike and run Le Longeron 2014
Published: 2014/10/17
Channel: Alvin Le Guelvouit
Citroen DS Right Longeron Titivation
Citroen DS Right Longeron Titivation
Published: 2017/05/30
Channel: Vincent Ingram
Longeron back in the winners circle
Longeron back in the winners circle
Published: 2014/09/03
Channel: 5frogz
Tu es né dans une étable - M&M
Tu es né dans une étable - M&M's LONGERON
Published: 2016/12/24
Channel: Mickael et Mélodie Longeron
Longeron makes it 3 in a row
Longeron makes it 3 in a row
Published: 2013/06/27
Channel: 5frogz
How to make main spar for hollow molded wing Fabrication d
How to make main spar for hollow molded wing Fabrication d'un longeron pour une aile creuse
Published: 2013/01/28
Channel: Rouge 13 model
F 15 crash, broken longeron
F 15 crash, broken longeron
Published: 2009/09/05
Channel: Dan Maucieri
Quick Tip - Longeron Attachment
Quick Tip - Longeron Attachment
Published: 2013/02/06
Channel: Folbot Kayaks
Longeron Extrusions, Networking With Other Builders, and a Podcast!
Longeron Extrusions, Networking With Other Builders, and a Podcast!
Published: 2017/05/26
Channel: Greg's Zenith STOL CH750
longeron (navajas)i almeja chocha
longeron (navajas)i almeja chocha
Published: 2012/11/09
Channel: sergio urchipia
Corsaire kazanoval vol n2 longeron carbon
Corsaire kazanoval vol n2 longeron carbon
Published: 2012/03/15
Channel: Valentin Delasalle
Professional Mold Manufacturer | Dongguan Longeron Mold Technology Co., Ltd.
Professional Mold Manufacturer | Dongguan Longeron Mold Technology Co., Ltd.
Published: 2017/04/24
Channel: Made-in-China.com
NASA ISS Longeron Challenge Introduction
NASA ISS Longeron Challenge Introduction
Published: 2013/04/08
Channel: opengovtv
Longeron - Flemington - Race 3 Sept 13 2014
Longeron - Flemington - Race 3 Sept 13 2014
Published: 2014/09/13
Channel: 5frogz
Longeron bashing: Blog 69
Longeron bashing: Blog 69
Published: 2016/09/16
Channel: rv12uk
Longeron - Third Start
Longeron - Third Start
Published: 2013/05/14
Channel: 5frogz
GP Laguna Seca COPA CLIO TCC Cocoloco29 vs ATG Longeron
GP Laguna Seca COPA CLIO TCC Cocoloco29 vs ATG Longeron
Published: 2013/07/07
Channel: coco loco
Maquette numérique SG38 - Longeron drapeau de dérive 14.35-U06
Maquette numérique SG38 - Longeron drapeau de dérive 14.35-U06
Published: 2016/01/19
Channel: PSX59 Apprendre-la-CAO.com
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WIKIPEDIA ARTICLE

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Interior of a Boeing/Stearman PT-17 showing small channel section stringers.

In aircraft and launch vehicle construction, a longeron, or stringer[1] or stiffener,[2] is a thin strip[not verified in body] of material to which the skin of an aircraft or propellant tank may be fastened.

Aircraft[edit]

In aircraft fuselage, stringers are attached to formers (also called frames)[citation needed] and run in the longitudinal direction of the aircraft. They are primarily responsible for transferring the aerodynamic loads acting on the skin onto the frames and formers. In the wings or horizontal stabilizer, longerons run spanwise[clarification needed] and attach between the ribs. The primary function here also is to transfer the bending loads acting on the wings onto the ribs and spar.

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 and run all along the fuselage length (usually 4 to 8), 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.[3]

Longerons often carry larger loads than stringers and also help to transfer skin loads to internal structure. Longerons nearly always attach to frames or ribs. Stringers often are not attached to anything but the skin, where they carry a portion of the fuselage bending moment through axial loading.[4] It is not uncommon to have a mixture of longerons and stringers in the same major structural component.

Space launch vehicles[edit]

Stringers are also used in the construction of some launch vehicle propellant tanks. For example, the Falcon 9 launch vehicle uses stringers in the Kerosene (RP-1) tanks, but not in the Liquid Oxygen tanks, on both the first and second stages.[1]

References[edit]

  1. ^ a b "Falcon 9 Launch Vehicle Payload User's Guide, Rev 2" (PDF). 21 October 2015. Retrieved 29 January 2016. 
  2. ^ Shevell, Richard Shepherd (1989). Fundamentals of flight. Englewood Cliffs, N.J.: Prentice Hall. p. 375. ISBN 0-13-339060-8. 
  3. ^ Bruhn, E.F., page C11.29, "Analysis and Design of Flight Vehicle Structures", 1973
  4. ^ Michael C. Y. Niu (1988). Airframe Structural Design. Conmilit Press LTD. pp. 376.

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