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Flywheel Skimming

A flywheel is a mechanical device specifically designed to efficiently store rotational energy (kinetic energy), which is proportional to the square of its rotational speed and its mass. Flywheels resist changes in rotational speed by their moment of inertia and in order to change a flywheel's stored energy (without changing its mass) its rotational speed must be increased or decreased. Since flywheels act as mechanical energy storage devices, they are the kinetic-energy-storage analogue to electrical inductors, for example, which are a type of accumulator.

Like other types of accumulators, flywheels smooth the ripple in power output, providing surges of high power output as required, absorbing surges of high power input (system-generated power) as required, and in this way act as low-pass filters on the mechanical velocity (angular, or otherwise) of the system.


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