Autark-Zero is the first motor sailer to be equipped with a wing-sail; this type of sail has gained name & fame in the America’s Cup high performance foiling catamarans. The Autark-Zero however, is not a high-performance catamaran, instead this yacht is aimed at sailors looking for a relaxing experience without the hassle of lines, winches, hoisting and lowering sails. A wing-sail has much higher lift-coefficient providing more forward propulsion than a traditional fabric sail. Using a A-symmetrical foil even more lift can be generated. The pressure and propulsion power can be adjusted by means of flaps at the front and back of the wing, when jibing the flaps change position so the A-symmetrical foil is maintained.

Patent granted

On november the 18th 2019 a patent is granted by the Rijksdienst Voor Ondernemend Nederland for the design/concept of the wingsail. The patent is registered under number 1042863 in the patent register with the description: ‘Sailing vessel with a center sail and two hinged side-sails of which the outer form resembles the form of an aircraft wing.’

Foldable wingsail

When the wing-sail is not in use the complete mast and sail assembly can be folded down and turns into a cockpit roof / bimini top. The raising and lowering of the wing-sail, like the control of the wing and flaps is a completely automated process. The central, on-board computer / autopilot effortlessly controls all moving parts and ensures the most efficient setting for the wing, flaps, rudders and dagger boards. The skipper and crew don’t need any sailing experience to enjoy a relaxing cruise on the Autark-Zero!

Multi-function wingsail

On a traditional sailing yacht the mast and sails only have 1 function: propulsion by means of the wind. On the Autark-Zero 3 functions are incorporated in the wingsail:

  • sailing: the A-symmetrical wingsail generates with a proportionately smaller surface a higher lift hence an more efficiënt propulsion
  • cockpit/bimini cover: When folded down the wingsail provides cover of the whole cockpit of the ship. The side flaps can be fully folded so the cover is open on the sides, when opened the flaps close of the sides of the cockpit to give shelter from rain or wind.
  • solarcollector: the whole surface of the wingsail is covered in PV solar cells; totalling almost 30 square metre on the whole ship the generated electrical energy is more than enough to operate the ship autonomously (autarkic)