[ChuckNorris89]

Turbocharger fans/impellers are not offset weights though but perfectly balanced and they are also lightweight.

A flywheel on the other hand is intentionally unbalanced, an offset weight, kind of like a clock pendulum spinning really fast, making it incredibly dangerous when something does go wrong. It basically becomes a centrifugal slingshot.

[detaro]

No, flywheels for this kind of energy storage are not "intentionally unbalanced", rather the opposite. Where did you get that idea?!