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France's 430 km/h jet train was 50 years ahead of its time

Jean Burton’s French Aérotrain rode on a cushion of air above a concrete guideway, with a jet engine driving it to 430 km/h ...
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America built a 196 MPH jet train then abandoned it

The M-497 Black Beetle was a modified New York Central railcar fitted with two surplus jet engines from the B-58 bomber. In 1966 it reached a recorded 183.68 mph and reportedly touched 196 mph, ...