摘要 |
A drive apparatus for an electrical generator (2) is disclosed. The apparatus comprises arms (6) adapted to support blades (14) in a flow of fluid. A central shaft (4) pivotably supports each of the arms about a respective horizontal axis such that flowing fluid engages the blades to cause rotation of the shaft about its longitudinal axis to actuate an electrical generator (28). A flap (16) adjusts orientation of the arms about the respective horizontal axes in dependence on direction of fluid flow. |