| 摘要 |
A bicycle with a PHI crank wheel. The PHI Crank Wheel is unlike a regular bicycle crank wheel is not round but almost elliptical with the radius varying in length at every quarter of the wheel. The longest radius to the shortest radius ration is 1.618 to 1. The leverage generated from the PHI crank wheel would be like changing the regular crank wheel from big to small at every quarter. With the bigger radius at the optimum cranks and pedals at horizontal level, the cyclist would able to use the weight of the cyclist to the maximum generating more power from the bigger crank position, While the pedals and cranks are at the vertical position the cyclist would use minimum strength to generate the greater leverage for propulsion. i 4 g ~ 4 ~Ij I ~1j >74 (2 -v___ ___'K) / 1' z 7 - U hi |
