Sounds like records with an asterisk (*) appended
> Mayf and List
>
> I too thought there would not be any difference due to the calculation
> method but because of the mathematical rules applied there can be a change
> to the second and third decimals of speed. Probably not significant to
> some but it clearly was to the governing body. They made the change in
> January 1978 and made all records prior to that date "absolute" and
> "therefore cannot be broken".
>
> The 'new method' provides the average mean speed of two consecutive runs.
>
> Times are required to be recorded to three decimal place of a second.
(The
> average of two times may then create four decimal places). Speeds are
> finally stated at three decimal places (although this may be two when a
> zero is the third decimal).
>
> Whilst the FIM work in kph, I did the maths of averaging the times and
then
> calculating speed for a mile - in mph of course (I took two times slightly
> above and below 12.800 seconds myself but do if you wish try others).
Then
> I did the calculation of the two run speeds from each time. Each mph will
> be to as many decimals as your calculator or computer has character spaces
> and should not be rounded or corrected. Then these speeds are averaged at
> which point you take the figure at three decimal places. The difference
> between the two methods for my figures was 0.005 mph.
>
> (At 20 to 21 seconds the difference was 0.06 mph).
>
> Try this some winter evening when its too cold in the garage and tell me
if
> you find the same.
>
> Whatever the result the FIM changed its complete records lists in 1978.
>
> Malcolm Pittwood, Derby, England
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