The more weight on the train, the smaller the gap between the magnets. All of these examples float well enough to demonstrate the forces involved. Check out the video below to watch a few different trains we constructed with this test track.

Yes, weight significantly affects the performance and efficiency of a Maglev (magnetic levitation) train, though in a different way than traditional wheel-on-rail systems. In an EMS (Electromagnetic Suspension) system, the magnets must work harder to pull the train upward against gravity; an increase in weight requires a corresponding increase in the electrical current supplied to the levitation magnets to maintain a constant air gap. This increases energy consumption and generates more heat in the electromagnets. For EDS (Electrodynamic Suspension) systems, which use repulsive forces, a heavier train requires higher speeds to achieve the necessary lift to stay levitated. Furthermore, weight affects the acceleration and braking performance; even though there is no mechanical friction, the train still has inertia (F=ma). A heavier train requires more powerful magnetic propulsion to reach top speeds and a more robust regenerative braking system to slow down. In 2026, maglev engineers focus on electromagnet weight reduction and using lightweight carbon-fiber composites for the car bodies to minimize these "dead weight" penalties and maximize the system's high-speed potential.