A mass flywheel is a mechanical tool meant to effectively store rotational energy. The tool has the potential to resist variations in rotational energy. Generally, the quantity of energy stored in them is directly related to the square of its rotational speed. The energy stored can thus be altered by modifying its rotational speed through the application of the torque brought into line with its axis of symmetry.
There are two types of mass flywheels, the dual and the standard one. A dual mass flywheel is divided into to two halves, the reason behind the name, with springs embedded between them to dampen the variation in torque and the acceleration of the rotation. This smoothens the vibrations leading to a smoother drive. Dual flywheel often wears out easily and can be too costly to repair or replace.
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