YesHas any proa put a lifting foil on the outside of the short side? I know you don't normally heel enough to have it be useful, but since proa folks tend to try stuff "normal" people wouldn't...
John Pizzey tried it, see photo. Theory being that it becomes a self levelling device making flying a hull easier and “safer”. It was bi directional.
Sidecar originally had a canting bi directional foil. Canted 45 deg to windward, it did lift the ama early, at around 7.5 knots, as opposed to 9.0 knots without. Canted to leeward, theoretically, it gave you extra RM and lift to windward. But you ran the risk of popping it and suddenly having much less RM, just when you need it most. The forces and loads involved were huge, I could never engineer the controls well enough, the hinge took 3 iterations before it was man enough. Dragging the foil through the water slowed the boat by a knot, so was hard to see any benefit overall. I took it off, with no regrets.
Photo: You can just make out foil in retracted position. Another risk was “catching” it retracted in big seas going downwind.