Word forms: (regular plural) flywheels
( Automotive engineering : Vehicle components , Engine, transmission, and exhaust )
A flywheel is a heavy wheel that is part of some engines. It regulates the engine's rotation,
making it operate at a steady speed.
A flywheel stores energy as it spins inside a casing.
A flywheel that keeps an engine turning relies on its momentum to keep going.
To function, the starter pushes a toothed gear so that it meshes with the flywheel in order to turn the engine over.
Collins English Dictionary. Copyright © HarperCollins Publishers