Fly wheel

A flywheel is a heavy metal wheel attached to a drive shaft, having most of its weight concentrated at the circumference. The main function of a flywheel is to reduce speed fluctuation by storing extra energy during part load as kinetic energy and the same is released during overloading by slowly increasing the speed of a flywheel, a small motor can store up energy which enable the motor to perform a function for which it is ordinarily too small.