What is the function of a flywheel?

A flywheel is a mechanical device used to store rotational energy. It helps to stabilize the rotation of a machine by maintaining a constant speed and reducing fluctuations in speed. Flywheels are commonly used in engines, vehicles, and other machinery to provide smooth and consistent power output. They also help to store energy during periods of excess power and release it when needed, making the operation of the machine more efficient.