PPRuNe Forums - View Single Post - Winglets..are they usefull?

6th Feb 2006, 14:33

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philleas fogg

Join Date: Apr 2004

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Winglets..are they usefull?

What i can recall from my limited knowledge of aerodynamics, wiglets help reduce wing tip vortices and thereby cruise drag. How come Boeing went for winglets on the 747 and BBJs, but not the 777?