[Land-speed] British Steam effort 139.843mph

Kirkwood saltfever at comcast.net
Wed Sep 2 04:02:47 MDT 2009


To get 1/1000 of any distance per hour, you have to be able to resolve time
to the 0.000277 seconds. However, fundamental metrology requires at least a
resolution of 1/10 to the right of the most significant digit to avoid
rounding errors. So timing resolution must be at  least 0.000027 seconds.
The Bonneville clocks are better than that and report 7 seven places to the
right of the decimal!

 

From: Malcolm Pittwood <mbp01 at sky.com>

(snip . . . ) "The calcualtion of the average speed . . . . "  All to a
timed accuracy of 1/1000th of a second and then expressed to 1/1000th of a
mph or kilo per hour.


More information about the Land-speed mailing list