Here is an interesting website that deals with a sailing technology that was worked on a number of years ago in England. At the time this was as radical (maybe more so) as the Dynarig concept on Maltese Falcon. One of the owners has recently surfaced, and desires to sell his vessel and build a bigger one. http://www.planesail.com/index.html
Larinka Stable, fast, and safe - the Wingsail is an eye-catcher and inspirational boat. One of four Walker Wing-sails in the world, this Trimaran is the ultimate symbol of technology and innovation combining for energy-efficient results. Originally designed by John Walker and built by Walker Wingsail, she has been re-crafted and perfected by her current owner, who has spared no expense in quality. Her 50' Sail Wing, powered by solar technology, inspires and attracts attention wherever she goes. She is an emblem of advanced, environmentally-conscious technology.Extremely smooth, stable and easy to sail, this Wingsail offers control through the mariner micro-computer as well as manual override systems. Wingsails are on the forefront of sailing capabilities. This emerging technology began as a prospect for use in commercial shipping as fuel prices rose.She combines the comfort of a motor yacht with and thrill of sailing.