名詞: n.
MAGLEV, or magnetic levitation, is a system of transportation that suspends, guides and propels vehicles, predominantly trains, using levitation from a very large number of magnets for lift and propulsion. This method has the potential to be faster, quieter and smoother than wheeled mass transit systems. The technology has the potential to exceed 4,000 mph (6,437 km/h) if deployed in an evacuated tunnel. If not deployed in an evacuated tube the power needed for levitation is usually not a particularly large percentage and most of the power needed is used to overcome air drag, as with any other high speed train.

The highest recorded speed of a maglev train is 581 km/h (361 mph), achieved in Japan in 2003, 6 km/h faster than the conventional TGV speed record. This is slower than aircraft, since aircraft can fly at far higher altitude where air drag is lower and thus high speeds are more readily attained.

詞條貢獻者： vivienshao  
 貢獻者按積分從高到低進行排序