Tachometer display conflict
Tachometer display conflict
(OP)
So, having a long commute allows me to spend countless hours in my car, inevitably staring at my dashboard while stuck in traffic. In doing so, I took a rather detailed look at my speedometer and my tachometer and noticed that the they did not seem consistent in the information display to the driver.
To start with, the speedometer is in miles per hour, the number you read is just that......mph.
The display of the tachometer seems a little backwards. When I read "3", that means 3000 rpm. Hence, one must multiply 3 by 1000 to obtain the correct rpm. BUT....when you read the little note, it says "RPM*1000". I contend that this is completely backwards. 3 = rpm/1000. 3 does not equal rpm*1000.
The rub is that when I read the speedometer, say 70 IS mph. But when I read the tachometer, 3 IS NOT rpm*1000. To be correct, it should read rpm/1000.
Now go easy on me, I am a structural guy. And yes, I know that this is the way every car has been done since day one, but it seems mathematically incorrect. Do you see my point?
To start with, the speedometer is in miles per hour, the number you read is just that......mph.
The display of the tachometer seems a little backwards. When I read "3", that means 3000 rpm. Hence, one must multiply 3 by 1000 to obtain the correct rpm. BUT....when you read the little note, it says "RPM*1000". I contend that this is completely backwards. 3 = rpm/1000. 3 does not equal rpm*1000.
The rub is that when I read the speedometer, say 70 IS mph. But when I read the tachometer, 3 IS NOT rpm*1000. To be correct, it should read rpm/1000.
Now go easy on me, I am a structural guy. And yes, I know that this is the way every car has been done since day one, but it seems mathematically incorrect. Do you see my point?





RE: Tachometer display conflict
RE: Tachometer display conflict
take what this "RPM" gauge is indicating and do a "x 1000" to it . . . and because we aren't going to clutter the face of this gauge up with all those zeroes we're telling you how to make sense out of what it does read.
Norm
RE: Tachometer display conflict
Problem is, they allow non-engineers to drive cars.
je suis charlie
RE: Tachometer display conflict
Cheers
Greg Locock
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RE: Tachometer display conflict
It's not 3=rpm*1000, it's 3rpm x 1000 = 3000rpm.
Same as it's not 50=mph, it's just 50mph.