How To Use A Tachymeter Watch | Tachymeter Explained!

 

Hello Guys welcome!  I’ve got a few watches here laid out on the table and uh many of us have chronographs in our collection, whether it be a speed master a speed timer some sort of a stop watch and so forth. Today I’m going to explain the simplest and most effective way to use a tachymeter on any chronograph. The intro today we're going to speak about chronographs namely tachymeters whether it's a speed master or a speed timer whatever version you might have yourself but uh the word chronograph itself it means the measurement of time it was uh it's basically a Greek word it comes from the word chronographs which means Chrono means time and graphos means to write or to record so it's the measurement of time so it's basically a fancy word for a stopwatch and that's what these things are. You know a simple chronograph like this is a stopwatch you hit the start button the seconds hand starts to measure elapsed time over something. You might be uh recording your son running across the field or something you stop you check it took him 10 seconds and then you can reset that's the simplest form of chronograph or stopwatch but what we're concerned about today is the tachymeter.

A tachometer is a function on a watch primarily used for measuring speed. However it can be used to compute many other things as well the tachometer scale is usually inscribed around the bezel or the outer dial of the watch mathematically the tachometer dial equals 3600 divided by the elapsed time in seconds as a result and due to accuracy and practical reasons. The printed tacky meter scale is valid for all times up to one minute from approximately 7 seconds moving on to. Some examples let's say you are watching a racing event and you want to determine the speed of a car in the race. Magazine you read that the distance between curve a and curve B is exactly 1 kilometer using your chronograph you notice. It takes the race car 20 seconds to cover this distance the tachometer scale reads 180 this means that the average speed of the car was 180 kilometers per hour keep in mind you can use other units of measurement for example the race magazine also tells you there is a distance of one mile between curve a and curve C repeating the exercise it takes the car 35 seconds to cover this distance the tachymeter scale now indicates slightly above 100 meaning the cars average speed was just above 100 miles per hour another example let's say we want to measure. How fast the same bolt runs 200 meters in the Olympics using the chronograph we notice it takes in 20 seconds to complete the race the tachometer scale indicates 180 km/h however we have to be careful and remember the race was only 1/5 of a kilometer so we need to get 1/5 of 180 which equals the actual average speed of the runner 36 kilometers per hour another example let's say you visit a car factory that completes one car every 45 seconds reading from the techie meter you conclude Factory on average completes 80 cars per hour now let's say you're visiting a luxury watch manufacturer observing the assembly line you notice the manufacturer produces one watch every 100 seconds. You can still use the tachometer scale even if this time is above 60 seconds in other words if the manufacturer produces one watch every 100 seconds this is the same as half a watch per 50 seconds 50 seconds is within the valid range of the tachometer scale and as a result you can calculate that 70 to 1/2 watches or 36 whole watches are completed on average in 1 hour.