"Wingtip devices increase the lift generated at the wingtip (by smoothing the airflow across the upper wing near the tip) and reduce the lift-induced drag caused by wingtip vortices, improving lift-to-drag ratio. This increases fuel efficiency in powered aircraft and increases cross-country speed in gliders, in both cases increasing range.[1] U.S. Air Force studies indicate that a given improvement in fuel efficiency correlates directly with the causal increase in the aircraft's lift-to-drag ratio.[2]"
These are the vertical upward fins sometimes seen on the ends of wings commercial aircraft.
I've seen downward tips put on Piper Tripacers, which would seem to accomplish the same thing (inhibit the generation of wingtip vortices thus reducing drag.)
They are a somewhat unique modes in this respect:
Many modifications seem to have tradeoffs (bush tires: Better rough field landings, but some increased drag. Shorter wings, more speed but less climb rate, Etc.)
These (ignoring initial cost and possible complexity of installation) seem to give more speed and better fuel consumption without any real downside.
Anyone know of these one LSAs?
Know of any thought that's ever been given to this possibility?
Curious,
Alex
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