| 摘要 |
A turbine for generating electrical power from a wind or tidal flow comprising a support shaft and a turbine blade assembly which includes a hub mounted so as to be rotatable on the shaft about a rotating axis and elongate blades extending from the same side of the hub and at the same angle thereto and each being rotational on the hub about their respective longitudinal axis. Gearing between the shaft and each blade causes each blade to rotate through 180° relative to the hub for each 360° rotation of the hub relative to the shaft. Preferably the gearing includes a main gear (Fig. 8, F) to which the blades are connected by respective spur gears (Fig. 8, H) , the main gear is adjustable so control the positions of the blades relative to the hub for a given rotational position of the hub.
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