| 摘要 |
A mechanical device consisting of two horizontal shafts ( 4 & 5 ) in cruciform each rotating axially within two sets of bearings ( 6 ), each set positioned near either end and interfaced upon a rotor base ( 10 ) which itself is fixed to a vertical power shaft 11 centrally. The powershaft rotates within two other sets of bearings ( 12 ). The horizontal shafts are each bolted to and pair of aerofoil section wings ( 2 & 3 ) through their respective flange plates ( 7 ), each wing being regulated axially by a cam ( 8 ) in 90 degree relationship. At any given moment, one wing will always resist ( 2 b & 3 b) the external power source ( 1 ) of wind or water current thereby bringing about rotation of the powershaft, whilst the opposite wings ( 2 a & 3 a) will transiently adopt a free flow posture.
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