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Consider two wings of equal area, one with half the span and twice the chord so it has a quarter the aspect ratio and four times the tip losses. Now add winglets, which are sized according to the chord, so the low-span wing will have winglets twice as tall. The winglets recover say 50% of the tip losses. Although the large winglet recovers more efficiency as ...


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No prior knowledge of this design choice, but the design direction seems pretty clear here. The original design reduces load towards the wingtip for efficiency. The textbook spanwise loading for maximum efficiency is the elliptical loading, however when tip devices, as in the original design, are employed, the tip load should not be zero. With a tip device, ...


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