ChatterBank4 mins ago
Speedo or GPS
Hello all,
just a quicky really.
Which is more accurate 1, The speedo in a vehicle or 2, The indicated speed on my Tomtom.
There is only about 5/6 Mph difference between them but with 9 points on my licence I'd be interested to know.
Thanks in advance.
Selwyn
just a quicky really.
Which is more accurate 1, The speedo in a vehicle or 2, The indicated speed on my Tomtom.
There is only about 5/6 Mph difference between them but with 9 points on my licence I'd be interested to know.
Thanks in advance.
Selwyn
Answers
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As TCL states, speedometers must be manufactured in such a way that they can never 'under-read' but may (within certain tolerances) ''over-read'. This allows for such factors as wear n the tyres and stretching of the tachometer cable to be taken into account.
SatNavs are generally far more accurate. Some people suggest that you need to take account of the time delay for the satellite signals to reach your car (and be to processed) but the satellites are only 22, 000 miles up and radio signals travel at 186,000 miles per second, so the delay is negligible.
Chris
SatNavs are generally far more accurate. Some people suggest that you need to take account of the time delay for the satellite signals to reach your car (and be to processed) but the satellites are only 22, 000 miles up and radio signals travel at 186,000 miles per second, so the delay is negligible.
Chris
Here's a few, with more search words there's probably more...............
http://www.theanswerbank.co.uk/Search/Sponsore d.asp?SearchText=sat+navs-speedometer&searchTy pe=site&x=14&y=9
http://www.theanswerbank.co.uk/Search/Sponsore d.asp?SearchText=sat+navs-speedometer&searchTy pe=site&x=14&y=9
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