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Why doesn't Antonov add winglets to their heavy cargo planes such as An-225 and An-124 to reduce induced drag?
Wiki User
∙ 11y ago
I can't think of any cathedral-wing aircraft that DO use winglets. Spanwise flow on a cathedral wing would be flowing 'uphill' (inward) and would be interrupted by the fuselage.
Wiki User
∙ 11y ago
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Winglets are not absolutely required but many planes have winglets added to improve the aerodymanic efficiency of the wing.
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Winglets are fitted to the tips of aircraft wings to increase the lift efficiency of the wing. As the airflow passes over the wing shape, the air going over the top of the wing has further to travel. The air flowing over the wing near the the fuselage body up to about 3quarters of the way towards the tip of the wing has to travel up and over the wing, thus creating the lift. Air, as with water will choose the path of least resistance, so airflow near the wing tip starts to go over the top of the wing but then" slips off " to the side meaning that the end section of the wing produces little or no lift. The winglets are there to stop the slipping off effect by blocking the airflow from slipping off. This means that lift is created along the full length of the wing.
