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Wingtip device
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== Actuating wingtip device == There has been research into actuating wingtip devices, including a filed patent application,<ref> {{cite patent |country= EP |number= 1531126 |title= Wing tip device |pubdate= 2005-05-18 |invent1= Jan Irving |invent2= Robert Davies |assign1= Airbus}}</ref> though no aircraft currently uses this feature as described. The [[XB-70 Valkyrie]]'s wingtips were capable of drooping downward in flight, to facilitate [[Mach number|Mach 3]] flight using [[WaveRider|waveriding]].
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