The train lifts off the rails as it's electric field shields it from the Earth's gravity, and it attempts to accelerate to the center of it's own Dynamic Gravitational Field. As it moves away from the coils the field strength diminishes, until it reaches a point of balance between  the mass of the train, the rate of travel past the coils, and the field strength. My Machine is somewhat different, in that the coils and magnets are in a fixed relationship with each other, and any acceleration would continue indefinitely. The Inductrac starts to accelerate vertically at a very low speed of about 2MPH. The fields in my machine and our planet, would be almost identical.