The next and previous America’s Cup yachts are equipped with rigid wing sails. I keep thinking about whether there may be a practical application for this type of sail on a cruising boat. So far, I don’t see it, given the issues with sailing on anchor, need to reduce sail quickly, and general unwieldiness. Still, in our game, one common objective is to be able to sail greater than 200 miles a day consistently, without running an engine. As that ambition becomes more and more of a focus, rigid wings do begin to get a longer look….