[time-nuts] Thunderbolt Accuracy needs...

Robert Darlington rdarlington at gmail.com
Sun Dec 21 17:34:49 UTC 2008


And faster speedometers make your warranty run out faster, which nobody
except the car companies like.

On Sun, Dec 21, 2008 at 10:21 AM, Magnus Danielson <
magnus at rubidium.dyndns.org> wrote:

> Thomas A. Frank skrev:
> > On Dec 20, 2008, at 6:03 PM, Burt I. Weiner wrote:
> >
> >> I suppose a good comparison would be: How accurate does the
> >> speedometer in the car really need to be and why.
> >
> > Accurate enough so that if its reading matches the posted sign, you
> > don't receive a ticket?
>
> An engineer pointed out that due to the spreading of readings on various
> speedometers un-necessary take-overs where performed by those having a
> higher speed for the same reading than those having a lower speed for
> the same reading. Thus, the precaution is to some degree compromised by
> the lack of consistency in the degraded reading. This is further
> compromised by people knowing their speedometers is degraded, so they
> form their own rules of how to interprent them in a favorable fashion.
> The tires and air pressure in them comes in as things compromising the
> scale. My speedometer gives different readings on my summer-tires than
> my winter tires.
>
> I think I actually prefer more exact speedometer in all cars. Then there
> is less room for subjective judgements and less of a discussion altogether.
>
> I think we already did some work in a similar fields like weigth,
> lengths and time...
>
> I learned alot of what my speedometer told me when looking at my TomTom
> reading.
>
> Cheers,
> Magnus
>
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