When I was younger my granddad owned a Cessna, and I remember them taking it to a
shop at great expense to have a kit installed on the wings that would allow for
shorter take off/landings. I remember that the tips were curved slightly
downwards, and they explained to me at the time that it helps keep more air under the wing to cause more lift.
Every turbine blade tutorial/picture/post/website shows pretty basic tips on ends.
Would something like a lip cause more lift/efficiency? I could not find the
exact kit they had but did find this interesting picture...
Has anyone spent any time looking into this or something similar?