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Almost everything you thought you knew about winglets is actually wrong. All the other Youtube channels and even Wikipedia talks about how winglets are there to stop wingtip vortices, this is not correct!
I found this out, to my astonishment, when I was researching for a completely different video and started talking to a great aerodynamics expert and friend of mine called Björn Fehrm.
In this video I will try and explain why winglets has nothing to do with stopping wingtip vortices and everything to do with aspect ratio and wingspan.
Enjoy my friends!
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Below you will find the links to videos and sources used in this episode. Enjoy checking them out!
Bjorn´s Corner:
https://leehamnews.com/2018/01/19/bjorns-corner-aircraft-drag-reduction-part-13/
Doug McLean about winglets:
https://mentourpilot.com/wp-content/uploads/2020/10/Wingtip_Devices-Doug-McLean-Boeing-flight-safety-conference-2005.pdf
Airbus: Albatross ONE
https://youtu.be/R9SRn5n7enQ
PlanesWeekly: Vortices
https://youtu.be/BaRb46vv_bQ
Stefan Langer: Gliders
https://youtu.be/OTN8J-lpQGM
Boeing: B777X first flight
https://youtu.be/J-9-jSEnkwI
Tamarack Aerospace Group, INC: Active winglets
https://youtu.be/XxsandFs4T4
Boeing: 737MAX and 787 flying together
https://youtu.be/nmefnkTvWIw