Lately I've seen a lot of aircraft that have the wingtips curved up. What is the reason for this?
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$\begingroup$ related aviation.stackexchange.com/questions/8544 and aviation.stackexchange.com/questions/8556 $\endgroup$– Federico ♦Oct 15, 2014 at 21:23
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$\begingroup$ Presumably because with composites, they can. Curving aluminium or steel would be a lot harder. With a composite wing, you can lay down the fiber in new ways. $\endgroup$– PeterOct 15, 2014 at 21:27
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$\begingroup$ Hey, Scottie. Just wanted to let you know that I'm closing because there is already a duplicate – with very different wording – not because it is a bad question (it's not!). $\endgroup$– egidOct 15, 2014 at 22:22
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$\begingroup$ I think we shuold leave this question here. It's a good example of this question on meta. Some people might now know what winglets are, so this question will lead them there. $\endgroup$– KeeganOct 16, 2014 at 4:32
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$\begingroup$ For drag reduction, due spilling air from the underside of the wingtips over the top side where the pressure is lower.After that the swirling pattern of airflows is left behind. So to minimise but not eliminate them the winglets is added $\endgroup$– George GeoSep 25, 2019 at 13:01