Abstract: Two or more pivots are mounted vertically or horizontally onto a rotary or stationary support structure or platform, and between these pivots, a flexible sheet of material is suspended. The mechanism operates via oscillation of the pivots that results from the upwind or upstream pivot determining the side of the flexible sheet the low-pressure (lift) area favors. The downwind or downstream pivot captures the energy from the lift generated. The mechanism makes use of adjustable pivot arm lengths and pivot spacing to tension or relax the flexible sheet, enabling control in various wind and water speeds. Alternate embodiments make use of cord attachments instead of rigid pivots, a double pivot that engages two flexible sheets in opposing action, circular/partial hemispherical sheets than enable omni-directional operation from a fixed embodiment, and shallow water body capability.

Abstract: Two or more pivots are mounted vertically or horizontally onto a rotary or stationary support structure or platform, and between these pivots, a flexible sheet of material is suspended. The mechanism operates via oscillation of the pivots that results from the upwind or upstream pivot determining the side of the flexible sheet the low-pressure (lift) area favors. The downwind or downstream pivot captures the energy from the lift generated. The mechanism makes use of adjustable pivot arm lengths and pivot spacing to tension or relax the flexible sheet, enabling control in various wind and water speeds. Alternate embodiments make use of cord attachments instead of rigid pivots, a double pivot that engages two flexible sheets in opposing action, circular/partial hemispherical sheets than enable omni-directional operation from a fixed embodiment, and shallow water body capability.