 Ground propulsion is any mechanism for propelling solid bodies along the ground, usually for the purposes of transportation.The propulsion system often consists of a combination of an engine or motor, a gearbox and wheel and axles in standard applications.Maglev (derived from magnetic levitation) is a system of transportation that uses magnetic levitation to suspend, guide and propel vehicles with magnets rather than using mechanical methods, such as wheels, axles and bearings.