DSS foils protrude more or less horizontally from the boat and generate buoyancy in the lee side, which increases stability, which benefits speed. On top of that, the wings dampen the movements in the sea. The patented Dynamic Stability System, an invention of the Briton Hugh Welbourn, is already used several times on monohulls, from the small, sporty Quant 17 from Switzerland to the mighty 142-foot yacht "Canova", which was recently delivered to Baltic Yachts.
According to Infiniti Yachts, multihulls with the more conventional C-foils generate between 10 and 20 percent of the displacement of buoyancy and this only at high speeds. The new Infiniti Catamaran 62 is supposed to deliver 18 percent vertical lift on its foil in less than ten knots of wind. The value increases to over 50 percent in 14 knots of wind and even reaches 80 to 90 percent at high speeds, according to the calculations. Infiniti sees a great advantage that the center of lift is maximally far outside of the ship, the Kat has a large virtual width, so to speak. The width of the 18.9 meter long cat is 9.5 meters, with extended wings the value increases to 13.8 meters. The foils run diagonally through the ship and emerge from the hull at an angle at mast height. They are operated electrically with captive winches or conventionally with electric winches. Both of the foils can be left outside while sailing, and this is even recommended on large courses. When the wind is weak and for the port, they can be completely retracted. Two symmetrical swords ensure a good performance on the wind.
The construction of the boat comes from Hugh Welbourn and Lucio Micheletti. It is created in a sandwich construction from carbon prepregs and foam. The wing mast is laminated from highly modular carbon fibers and equipped with a rotation system on request. There are two steering positions at deck level directly on the superstructure. The comparatively narrow hulls nevertheless accommodate a generous layout: two cabins and two bathrooms on port, a master cabin and a large bathroom as well as a crew cabin with wet cell on starboard. Construction number 1 is in progress.
Baltic 142 "Canova": largest mono with DSS
Back and forth under the owner's bunk: individual sliding DSS plank on "Canova"
More information about Infiniti Yachts here
Photo gallery: Infiniti Yachts Catamaran 62
The system in a small monohull format:
Photo gallery: Quant 23