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Old 04-08-2014, 02:11 PM   #16 (permalink)
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I've been studying Wingfield of aircraft since they're the same shape and have tips specifically designed to eliminate this problem.

The F-173 was basically all wingtip. What made it work was the propwash from the counter-rotating props ahead of the wing.

Also, consider the construction of this:

All simple curves and no longitudinal edges.

If you cut the gores lengthways you wind up with more seams.

I could mount a small turbine and let it spin freely to see the effect of the vortex.
I notice the Airbus example uses a 'feathered' prop. It wouldn't need to be much more than a tachometer on a forward-reaching arm [or tentacle] that can be adjusted around. No vortex would equal zero RPM.

Last edited by freebeard; 04-08-2014 at 02:35 PM..
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