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This video shows NASA researching folding wings, in what looks like a model of an airliner. What would be the benefit to this technology?

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    $\begingroup$ Highly related possibly dupe. $\endgroup$ – FreeMan Jun 27 at 17:37
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    $\begingroup$ @FreeMan partially, but the NASA research allows moving them in flight, which has a lot more effects than just fitting into a smaller gate space. $\endgroup$ – fooot Jun 27 at 17:39
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It would allow an aircraft to have a wingspan of >80 meters yet still be able to be serviced at a standard airport gate.

There are a variety of benefits to longer wingspan, but the major drawback is that commercial passenger airports are designed around that 80 meter box.

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It looks like these wings have ends that fold up to become winglets, for drag reduction at high speed, and down to increase wing area, and thus lift, at low speed for takeoff and landing.

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