Quote:
Originally Posted by 3-Wheeler
Since then, I found an old camera around the house and am recording the speedometer readings during coast-downs in video mode. I play back the video frame-by-frame to get the exact speed decrease and put the numbers into a spreadsheet.
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I've done exactly this kind of testing (to test low speed rolling resistance).
It can be very accurate, especially with a digital speed readout.
(Far more precise than a stopwatch & analog gauges, which is how some tried doing it in the olden days.)