On Sat, 20 Sep 2008 18:30:20 +0100, "Mortimer" <me@privacy.net> wrote: "Petert" <peter.thomas8899@googlemail.com> wrote in message news:oqbad4tqqse5u15etr5v1sac9c4hpt2cog@4ax.com... On Sat, 20 Sep 2008 13:09:53 +0100, "Mortimer" <me@privacy.net> wrote: Someone explained to me once that the speed shown by a GPS receiver isn't necessarliy accurate as you may be driving up or down a steep hill - the GPS will show your ...

"Petert" <peter.thomas8899@googlemail.com> wrote in message news:oqbad4tqqse5u15etr5v1sac9c4hpt2cog@4ax.com... On Sat, 20 Sep 2008 13:09:53 +0100, "Mortimer" <me@privacy.net> wrote: Someone explained to me once that the speed shown by a GPS receiver isn't necessarliy accurate as you may be driving up or down a steep hill - the GPS will show your speed as though you were driving along a flat road Good point. Let's look at ...

On 20 Sep, 13:19, %%ste...@malloc.co.uk (Steve Firth) wrote: GPS + the current speed sensor for when there's no satellite coverage (such as inside tunnels) would be enough. The speed sensor could be calibrated from the GPS when there is a signal. This is already used for some upmarket in-car GPS navigation systems. GPS doesn't give an accurate speed on gradiants. If you're the amazing engineer you make out you'll know why won't ...

On Sat, 20 Sep 2008 13:09:53 +0100, "Mortimer" <me@privacy.net> wrote: "Petert" <peter.thomas8899@googlemail.com> wrote in message news:m1o9d4hir57o1ik14bbu1tamjde3dmg8il@4ax.com... On Mon, 15 Sep 2008 05:29:39 -0700 (PDT), Boltar <boltar2003@yahoo.co.uk> wrote: I suppose one reason is that the radius, or rather, the circumference of the wheels of cars/lorries etc aren't constant. It will change as the tyre wears ...

... Sep 2008 05:29:39 -0700 (PDT), Boltar <boltar2003@yahoo.co.uk> wrote: Since truck, bus and train speedos can be accurate why can't they do the same for cars? It can't be hard in these days of electronic ... so whats the problem? I drove past one of these flash you speed up signs the other day and while my speedo said 38 the sign said 34 so thats a good percentage out. And my tyres and new and inflated to the correct ...

"Petert" <peter.thomas8899@googlemail.com> wrote in message news:m1o9d4hir57o1ik14bbu1tamjde3dmg8il@4ax.com... On Mon, 15 Sep 2008 05:29:39 -0700 (PDT), Boltar <boltar2003@yahoo.co.uk> wrote: I suppose one reason is that the radius, or rather, the circumference of the wheels of cars/lorries etc aren't constant. It will change as the tyre wears down and as the pressure of the air inside it expands/contracts/leaks. ...

... Mon, 15 Sep 2008 05:29:39 -0700 (PDT), Boltar <boltar2003@yahoo.co.uk> wrote: Since truck, bus and train speedos can be accurate why can't they do the same for cars? It can't be hard in these days of electronic ...an axle so whats the problem? I drove past one of these flash you speed up signs the other day and while my speedo said 38 the sign said 34 so thats a good percentage out. And my tyres and new and inflated to the correct ...

... child of When she ditches him his young mother gives him a chireader movies filmfest 10 absoluty free nude teen porn pics pics absoluty free nude galleries free young xxx free young xxx picks free youngest speedo boy galleries free youngest teen porn teen porn pics nudepic free yugoslavian porno free cocanews net free622 3 Amateur pictures feet non nude sexy pics pf cheerleaders in high Free Girls Pictures japanese vaginas youngest girls ...

... old and new tyres and over and under inflation. To try and match all of these would require individually calibrated speedos and periodic adjustment at a fair cost compared to "one size fits all" for less money And since speedos are not allowed to under-read by law, it's safer to set them to over-read to allow for any ...

...>> account old and new tyres and over and under inflation. To try and match all of these would require individually calibrated speedos and periodic adjustment at a fair cost compared to "one size fits all" for less money And since speedos are not allowed to under-read by law, it's safer to set them to over-read to allow for any ...