Unlike, say, an electric milk float, EVs are astonishingly silent, with just the wheel rumble and an occasional electric whine to alert you to their approach.

Maglev is short for magnetic levitation 1 , which means that these trains float over a guide way using the basic principles of magnets to replace the old steel wheel and track trains.

By controlling the process parameters, the hollow wheel gear may be caused to rotate in the media and can be made to float at a desired level.