Rick, "By comparison rigid wings on a small boat in open water has challenges far beyond this - challenges that I can see no reasonable practical solution."
Maybe, at least your objections have exposed me to potential problems I hadn't really considered and for that I thank you.
Primarily I had thought that the biggest forces on the wing could only be across the camber from lift. I hadn't really factored in wave action swinging the mast chord wise and the resultant forces. I can see now that I have to beef up the box beam chord wise. The wing action has one more degree of freedom than it does on a plane.
Also wing twist, AOA issues and span-wise airflow are probably bigger issues than I had thought. I think Rob Riley has the right idea with a lowered aspect ratio and the corresponding less acceleration.
The most important feature of the wings is their set and forget aspect, they may not generate huge amounts of power, but an extra 10 to 20 hp with very little drag is huge as our hp calculations have shown.
The boat isn't going to be a speed demon but it should be fast enough to get out of trouble. An honest 10 to 12 knots of speed (that is the goal anyway) for a cruising boat is pretty good.
Talador
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Posted by: taladorwood@yahoo.com.au
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