Lead: Aware of repeated and often deadly railroad accidents, George Westinghouse developed the air brake.

Intro.: A Moment in Time with Dan Roberts.

Content: At first Westinghouse tried to harness the steam generated by the locomotive, but found that by the time steam reached the rear of the train it had begun to condensing thus losing its power to force the brakes. His solution came while reading a magazine article describing the construction of the huge railroad tunnel through Mont Cenis in the Italian Alps. Instead of generating steam deep in the mountain for drilling which would eat up precious oxygen, engineers compressed air on the outside and pumped it to the tunnel face. Westinghouse applied the same principle to stopping trains, some of which were dozens of cars in length.

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