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Old 25th May 2002 | 12:40
  #7 (permalink)  
itwilldoatrip
 
Joined: Feb 2001
Posts: 80
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From: Sandpit
Ghenghis is right. They reduce the flow of air outward over the wing tip which causes drag.
Didn't Mc Donnel Douglas have to fit them on the MD11 to get the fuel burn and range quotes on the aircraft they sold to Swissair.
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