Karmans

11:03 Jul 28, 2007
French to English translations [PRO]
Tech/Engineering - Aerospace / Aviation / Space / Aircraft Context - Trains et Freins
French term or phrase: Karmans
What exactly are these and is this the normal description for them?


I suupose that this is like 'Lockheed', which seems to be the title for brake fluid.
crossleydd42
Local time: 21:41


Summary of answers provided
4karmans de frein ou caches
Drmanu49
1stall fence
Robert Frankling


Discussion entries: 3





  

Answers


2 mins   confidence: Answerer confidence 4/5Answerer confidence 4/5
karmans de frein ou caches


Explanation:
En fait ce sont les karmans qui sont bien positionnés donc ma simplification résulte en ... Le Fanatique de l'Aviation n°134 et 311 : les Mystère israéliens ...
modelstories.free.fr/analyses/avions/MS2001_2/HTEC_Mystere/index.html - 18k -

Le type de réalisation des karmans (rajoutés sur un fuselage qui n'est ... Pour éviter ceci deux solutions: ne pas mettre de karmans ou refaire le moule! ...
pierre.rondel.free.fr/images/genesis/genesis.htm - 41k

Drmanu49
France
Local time: 22:41
Specializes in field
Native speaker of: Native in EnglishEnglish, Native in FrenchFrench
PRO pts in category: 175
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2 hrs   confidence: Answerer confidence 1/5Answerer confidence 1/5
Karmans de frein
stall fence


Explanation:
karman de frein = stall fence ???

The other significant changes to the wing are an unusual-looking wing-root fillet that the French call a karman," and a redesigned wing stall fence. The karman looks like the nose of a wing rib attached to the fuselage of the airplane. It mimics the shape and camber of the extended leading-edge slats, so air flows more smoothly over the wing-fuselage inta-section in the takeoff or landing configurations, further reducing stall speed. Dassault says that, despite its unusual appearance, the karman adds no drag in cruise. The stall fence on the 200 is much shorter and is placed farther forward than on the 20. Research has shown that spanwise airflow at high angles of attack on swept wings can be as effectively blocked with a short fence near the leading edge as with a large fence extending over the chord of the wing. Dassault takes great pride in the fact that its airplanes require no stick pushers or other stall-barrier systems to achieve a predictable straight-ahead stall break instead of the sharp wing roll that is common in swept-wingjets.
http://www.pocketprotectors.com/atf3/F200.htm

raccordement d'aile

Domaine : Défense.
Définition : Carénage placé à la jonction de l'aile et du fuselage pour améliorer l'écoulement de l'air.
Note : Le terme « karman » est à éviter.
Anglais : wing fillet.
(Source : arrêté du 12 août 1976)

Glossaire informatique des termes publiés au Journal officiel par la Commission générale de terminologie et de néologie le 22 septembre 2000
By Philippe Deschamp,
Institut National de Recherche
en Informatique et en Automatique

Philippe.Deschamp[at]INRIA.Fr

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Note added at 2 hrs (2007-07-28 13:24:52 GMT)
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since you have no context...

WING FILLET



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Note added at 2 hrs (2007-07-28 13:32:41 GMT)
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"Von Karman Vortex Trail"

Born in Budapest, Hungary, von Kármán began his research in aerodynamics while teaching at the University of Göttingen, starting with an observation related to fluid dynamics. In 1911, while observing currents of water in a flow tank, von Kármán observed the presence of eddies (counter-rotating currents) in the wake of a moving object. This observation led to the Kármán Vortex Trail, a scientific snapshot of the structure of a wake behind a moving body under certain conditions. This discovery on the structure of airflow led to studies on air turbulence that has advanced the design and performance of aircraft.

The "wing fillets" reduce these vortices and consequent drag and vibration.

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Note added at 3 hrs (2007-07-28 14:05:20 GMT)
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Il existe principalement deux types de train d’atterrissage :

les trains « classiques », (aussi appelé taildraggers), qui sont composés de 2 trains principaux à l’avant du centre de gravité et d’un train auxiliaire à l’arrière,
les trains « tricycles » qui sont composés de 2 trains principaux légèrement à l’arrière du centre de gravité et d’une roulette à l’avant.
http://fr.wikipedia.org/wiki/Train_d'atterrissage

Picture of landing gear covers(karman): TRAIN PRINCIPAL
http://www.dynaero.com/lien/mc100/tprcarenage.htm

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Note added at 3 hrs (2007-07-28 14:10:40 GMT)
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karman du train = LANDING GEAR FILLET

For each FORWARD landing gear assembly, remove the landing gear fillet assembly (fillet assembly), the three rivets, and the support assembly, ...
rgl.faa.gov/.../rgAD.nsf/0/af8fb1a26227b539862572fa004adf50!OpenDocument&ExpandSection=-3

Robert Frankling
Local time: 15:41
Native speaker of: English
PRO pts in category: 8
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