Flettner rotor with localized suction

Hull propulsion mechanism

Sail construction

Command and control device for kites

Kite control bar with integrated line adjustment means

Portable catamaran vessel

Aerodynamic fairing and flap for generating lift and methods of using the same

Propulsion device using fluid flow

LEISURE BOAT

Segmented wind turbine airfoil/blade

Energy system and boat

Regenerative motor propulsion systems

Vertical axis wind engine

Airborne rigid kite with on-board power plant for ship propulsion