Javaman said:
I have a local 5K to measure and get out to Doug Loeffler (I know Doug's business sometimes gets in the way of speedy certification - we've talked on the phone a couple of times.) very soon. Would you like me to send you copies of Protege and JO measurements if I can get my partner to ride the course with me?
It’s not necessary to actually measure a course using a JO and a Protégé. All you need to do is ride around the block several times, stopping here and there and recording revolutions and counts. The JO counter with the metal drive gear records 23.63636363…. counts per revolution of the bike wheel.
Once you have recorded several pairs of readings you should find that each interval will show JO counts to be 23.63636363 times the number of revolutions recorded.
If it’s too cold to ride, bring the bike inside and spin the front wheel by hand. If you have the Protégé set up properly you will find almost perfect agreement.
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