I'm seeing some Beechcraft Barons with winglets. Do these improve performance and, if so, by how much?
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2$\begingroup$ welcome to aviation.se. Did you have a look at our old questions on the subject(aviation.stackexchange.com/q/2111/1467 aviation.stackexchange.com/q/8556/1467) ? is there something still not clear that you would like explained? $\endgroup$ – Federico♦ Aug 19 '16 at 6:46
