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What is a tachymeter?

April 26, 2017tachymeter

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What is a tachymeter?

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A tachymeter is an instrument for measuring speed. It is a chronograph with a graduated dial on which speed can be read off in kilometres per hour based on a 1000 metre distance. How to read the tachymeter: Only the central chronograph second-hand is used. For longer durations, the indications of the timers (minutes and hours) also count. Example for calculating the speed of a car: The chronograph indicates that the distance of one kilometre has been covered in 30 seconds. The corresponding point on the tachymeter scale indicates 120. The speed is therefore 120 km per hour.