NOVELTY - The system has a balance beam (14) with force and load arm sides (34, 36), where the sides define a balance beam fulcrum. The balance beam is attached to a support mast (12) at the fulcrum. An angle of attack positioner (17) adjusts an angle of attack of a fluidfoil (18) to a constant positive/ negative lift position by an energy recapture device (61). A fluidfoil mast (40) is attached to the balance beam and a control rod, and extends parallel to the mast (12). A vane (60) is placed on the mast (12) and positions the fluidfoil.    USE - Used for capturing flow-driven energy e.g. wind power and hydropower, from a flowing fluid e.g. wind and water, in a windturbine and windmill, that is utilized in a hydropower plant e.g. dam, for pumping water, grinding grain, crushing stone and for converting kinetic energy into electrical energy.    ADVANTAGE - The angle of attack positioner adjusts the fluidfoil`s angle of attack to constant positive or negative lift position so as to provide up and down motion that produces lift in both directions, and hence improving energy harvesting capability from low velocity fluid flow as well as high velocity fluid flow. The design configuration allows the energy recapture device to recapture the energy so as to conserve and reuse the energy forces for controlling fluidfoil transitions from positive to negative lift orientations. The force arm and load arm sides are of different lengths so as to provide a mechanical advantage for enhancing oscillatory motion even in the presence of low energy fluid flow which is a function of the fluid density and velocity. The fluidfoil mast that is attached to the balance beam and control rod extends parallel to the support mast so as to effectively form a dynamic rhomboid assembly, thus allowing the fluidfoil to maintain an optimum angle of attack into fluid flow.    DESCRIPTION OF DRAWING(S) - The drawing shows a plan view of a flow-driven energy capture system.    Support mast (12)    Balance beam (14)    Angle of attack positioner (17)    Fluidfoil (18)    Ends (30, 32)    Force arm side (34)    Load arm side (36)    Fluidfoil mast (40)    Vane (60)    Energy recapture device (61)