
A hovertrain is a type of high-speed train that replaces conventional steel wheels with hovercraft lift pads, and the conventional railway bed with a paved road-like surface, known as the `track` or `guideway`. The concept aims to eliminate rolling resistance and allow very high performance, while also simplifying the infrastructure needed to ...
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http://en.wikipedia.org/wiki/Hovertrain

an experimental high-speed British train that rides on a cushion of air and is propelled by a linear motor. · (l.c.) aerotrain.
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https://www.infoplease.com/dictionary/hovertrain
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