Importance

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Abstract

A hub is provided defining an axis of intended rotation to be disposed generally parallel to the direction of wind movement and the hub is hollow and include opposite ends spaced along the aforementioned axis. One end of the hub is closed and the other end is open to receive therein the wind incident upon the hub. The hub includes a plurality of elongated hollow propeller blades supported therefrom including root and tip ends as well as leading and trailing edges. The blades have their root ends supported from the hub at points spaced thereabout with the root ends opening into the interior of the hub inwardly of the open end thereof and the tip ends of the blades extending outwardly from the hub. The trailing edges of the blades include air outlets slots extending and spaced therealong opening outwardly of the blades in directions generally opposite to the directions in which the leading edges of the blades face and the blades are supported from the hub for adjustable angular displacement about their longitudinal axes relative to the hub.

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First Claim