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Aviation Partners Spiroid winglets

mz

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This new circular winglet has been making the news lately with claims on big fuel savings (over 10%) or so.

http://www.aviationpartners.com/spiroids.html
 

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CammNut

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Far from new - Aviation Partners actually flew this spiroid-equipped GII back in the early 2000s and it didn't catch on then.
 

Trident

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Nevertheless, the idea is not dead, it seems:

http://www.airliners.net/photo/Dassault-Falcon-50/1749946/L/

http://www.airliners.net/photo/Dassault-Falcon-50/1749948/L/
 

fightingirish

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Some say drag reduction methods at the wing-tips like these "Spiroid Winglets" are the holy grail of modern aerodynamics.
 

Trident

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Slightly OT: there is now a wing tip mod for the MD-80 series out there, apparently:

http://www.airliners.net/photo/Jetran-Air/McDonnell-Douglas-MD-82/1075139/L/

http://www.airliners.net/photo/Jetran-Air/McDonnell-Douglas-MD-82/1088763/L/

The same airframe before modification for comparison:

http://www.airliners.net/photo/Jetran-Air/McDonnell-Douglas-MD-82/1051746/L/
 

Triton

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Grey Havoc

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Winglets - All Shapes, Sizes - and Uses (Aviation Week/Things With Wings blog)
 

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