The latest version: Mark IV (Source: Omer Wing-Sail) This wing is based on a rotating A frame mast, that supports the wing in both sides, having an accurate wing profile as well as high moment of inertia. It is made of three different sails – two main sails and one leading edge sail. All three … Read more
Mark III is based on a new concept of a free standing “A frame” mast. The wing shape is made by two main sails and one leading edge sail. Once all of them are hoisted, we get a variable geometry wing that can be reefed.