Adrian,
Your specs remind me of the recent cataproa New small Multi from Icarus - Boat Design Forums
which is essentially a tacking proa with equal length hulls.
I believe this can be improved upon. I would make it a shunting proa with equal hull lengths in the HP planform with schooner rig. It could be made lighter using intelligent infusion (the heavier cataproa is targetted at 70 kg) and keeping the hulls at equal hulls requires only one half easy mold. I wonder if in that size you could use just a long sculling like oar as rudder to simply switch end to end on a shunt and a bidirectional dagger board to the inside of the lee hull. The hump does look like a wind catcher though.
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Posted by: lucjdekeyser@telenet.be
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