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turbotrain

[tur-boh-treyn] /ˈtɜr boʊˌtreɪn/
noun
1.
a train powered by a gas-turbine locomotive.
Origin
1965-1970
1965-70; turbo- + train
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Encyclopedia Article for turbo train

high-speed passenger train powered by a gas-turbine engine similar to that used in jet aircraft. Unlike conventional trains, the turbo variety does not have a separate locomotive; its turbine power unit is small enough to be built into a passenger car. A typical turbo train consists of several passenger cars with power units located in each of the end cars. The cars are constructed of aluminum, and this, with various other design features aimed at reducing weight, minimizes the power required for high-speed locomotion. A pendulous banking suspension system enables the turbo train to travel around corners safely and smoothly at speeds 30 to 40 percent faster than other types of trains. With such a suspension system, a car is suspended above its centre of gravity so as to swing freely from a special frame, which causes the train to bank inward rather than outward around curves under centrifugal force.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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