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Le Forum Voilier Albatros • Afficher le sujet - L'Albatros plane dynamiquement

L'Albatros plane dynamiquement

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L'Albatros plane dynamiquement

Messagepar Jaffar » Ven 7 Fév 2014 09:19

L'albatros plane dynamiquement en plongeant au portant (avec le vent) vers le plus bas de la couche limite où le vent est affaibli par le frottement sur l'eau, puis en remontant au près (contre le vent) au-dessus de la couche limite où le vent est à sa force maximum, force qu'il utilise pour gagner de l'altitude et donc emmagasiner de l'énergie potentielle. L'albatros utilise cette technique pour parcourir des distances de plusieurs milliers de kilomètres dans les mers du Sud sans battement d'aile notable. L'albatros extrait donc de l'énergie à partir du gradient en altitude de la vitesse du vent.

Image
Remarquez l'allongement impressionnant de la voilure!
Image
Le vol de gradient (dynamic soaring) de l'albatros (dans ce dessin, l'allongement de la voilure de l'Albatros n'est pas correcte).
Image
Illustration de la couche limite
La couche limite

Dynamic Soaring: How the Wandering Albatross Can Fly for Free
The Nearly Effortless Flight of the Albatross
Jaffar


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