Since Aviation Partners certificated its first winglet mod for the Gulfstream II in the early 1990s, the drag reducing devices have proliferated in both business and commercial aviation applications as a cost-effective way to increase efficiency in older aircraft designs by as much as 5 percent. Conceived by NASA’s Dr. Richard Whitcomb in the 1960s, winglets minimize wingtip vortices and thereby lower induced drag. As the price of Jet-A has skyrocketed over the last two years, they’ve ...


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