To provide a flywheel that resourcefully uses existing high-performance equipment and generates mechanical energy.

Electricity is provided as follows: the existing equipment of currently the highest-performance model is used, and a motor and the like are rotationally actuated by electricity. Thus, the functions of the first flywheel, second flywheel, third flywheel, guide plate, and the like in the figure are put together to form motive power for generating mechanical energy. This is multiplied and increased, and the resulting ultimate energy is applied to a generator to generate power. The amount of output of electricity obtained by the conversion into electrical energy is larger than the amount of input consumed by the motor.