Updating window weight
“The outboard cassettes will bear the upward load and the inner cassettes the downward load when the foil is deployed.” In terms of the DSS technology’s safety, the foil extends outboard less than the boom or the mast when the boat is heeled, so it is unlikely the foil would come into contact with another yacht or structure. Without the DSS foil, the yacht would maintain sufficient stability from the keel and, while the sails might need adjustment, the yacht would remain safe – any certified yacht is required to have minimum stability.
In conjunction with Farr Yacht Design and composite engineers Gurit, the design team has built a slight blister into each side of the hull to increase beam locally and provide a greater distance between the two sets of bearing cassettes to spread the loads more efficiently.
“The foil will run on four sets of 25 composite roller bearings contained in titanium cassettes,” explains Roland Kasslin, head of research and development at Baltic Yachts.To keep a yacht upright, traditionally lead is added to the bottom of the keel, and on race boats crew are placed on the rail.This has been taken a step further with movable ballast solutions in the form of water ballast and canting keels, with both features having been implement on superyachts.To extract good performance from modern boats with big sail plans, most have significantly more weight in their keels than would be required for safety.More weight means more sail, and more sail means greater rig height, which in turn means a deeper keel and more effort to move the boat in light air, not to mention more cost.