Tachymeter Explained: How That Scale on Your Chronograph Actually Works
The tachymeter scale on a chronograph turns elapsed time into speed. Here is the math behind it, how to actually use it, and why it stops working below 60 units per hour.
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The tachymeter scale on a chronograph turns elapsed time into speed. Here is the math behind it, how to actually use it, and why it stops working below 60 units per hour.