His malaise couldn't snuff his imagination and love of his work, however. He refocused his efforts on commercially viable machinery and-in 1906, on his 50th birthday-presented a 200-horsepower bladeless turbine engine to the world. He was also contracted by the Waltham Watch Company to build the world's first and only air-friction speedometer,
( Sean Patrick )
[ Nikola Tesla: Imagination and ]
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