For all their design innovations, railways still retain one fundamental
weakness - they put metal wheels onto metal tracks. Not just inefficient
as there is limited grip between two such smooth surfaces, but noisy as
well. So why don't they use something different? Well, railway
companies have tried. And sadly failed.
It's mainly a Frenchman we have to thank for the best attempt to deal
with the metal upon metal, and that was tire magnate Andre Michelin who
upon returning from an unpleasant train trip instructed his engineers to
develop something better.
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