"Wing Fin Sail"

Based on images readily found in a rural and coastal hinterland.
I have been toying with this concept for nearly 20 years
but only now do I feel I have a handle on how the mechanics
and the image should work.
New materials have also helped.
There are many more combinations and solutions to the concept in the pipeline.

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73 inches x 20 (R) x 40(L) inches.................................................................