View single post by ambience360
 Posted: Sun Nov 5th, 2006 07:56 am
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ambience360



Joined: Mon Jul 31st, 2006
Location: Germany
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 Tachymeter / Tachometer
The tachymeter is the miles per hour indicator along the outer edge of the watch face. It is meant to be used in conjunction with the chronograph feature to measure speed over a distance of one mile (or kilometer).
  1. Begin with timer hands at zero.
  2. Start the chronograph when the object in motion moves from the starting point.
  3. Stop the chronograph when the object in motion has traveled one mile.
  4. The seconds hand chronograph timer (the large seconds hand) will have advanced to a point on the tachymeter. The corresponding number indicated by the tachymeter is the average speed (in MPH) the object has traveled over the mile distance.
Note: The object must have traveled exactly one mile for the tachymeter to be accurate. Sometimes kilometers per hour (km/h) are used instead of miles, it's marked on the starting point of the scale normally.