See http://bigcatcatamarans . I've been following Bertrand on the junk rig group, and my concept is similar to the one you are talking about. I invented it independently, and was told about the SwingWing concept after I posted about it on the junkrig group on Yahoo. Tystie is another boat with a rig with a similar concept, and Tystie's owner also posts on the junk rig group. My version uses the Clark Y foil, as advised on http://tspeer.com .-Tim Dunn, near Seattle

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