Amazing, the difference in the architectural solutions chosen by the design teams for the first four ac75s launched recently. On their blank sheet of paper, or rather their monitors, they started from a rather basic box rule, with a hull length of 20.70 meters, a maximum beam of 5 m, a displacement of 7.6 tons including two foils with ballast weighing 1215 kilos each, and a few contingencies.
Two limit measures, at 17 and 19 meters from the stern are imposed to prevent scows, a minimum freeboard of 1.50 meter in one spot; the position of the mast and the length of the boom are both determined. An important measure, which helped us to reconstitute these drawings, considering the distortion of shapes that appears in most photos, is the distance between the two axes of foil rotation, i.e. 4.10 meters. The distance between the two axes of foil rotation is 4.10 meters. The distance between the two axes of foils is 4.10 meters. In fact, the 75 feet, or 22.86 meters, corresponds to the overall length, including the bowsprit. Read on.
