I originally thought a wing might sit around a hull mounted boss, just a captive shaft that protrudes some 8-10ft  out of the deck. As the boss itself doesn't rotate I think this would result in less unequal loads on the bearing.

The wing would then be requiring of two main spars much like many aircraft that have flaps adopted, as the boss and its bearings would need to inhabit the balance point. The structure for the boss is between two wing spars.

The benefit of this is the cantilever and so the contributing moment is less, so the whole bearing requirement is less by the difference in mean heights, for example 3ft below deck for a spar and 5ft above for a boss; or 8ft. Among the downsides, the boss is likely to be weighty and the bearings may need an aerodynamic blister on the wing skin to offer sufficient diameter.

• New Members 1