Yes, I was thinking that only a low AR sail with a low yard angle would put enough area in the right position. Even so, the main mast would have to be higher. The mizzen would only be a balancing sail, and the "first reef". There doesn't seem to be enough room between the fore and main masts for a foresail of sufficient area to be worthwhile, so to add a foresail, the mainsail needs to be moved aft, to somewhere near amidships. then you'd have the usual distribution of areas for a three-masted schooner. It would be usual to stay with two masts on a boat this size, but I can think of one other three-master that's even smaller - Meleet.