XII. Example of Actual Course Certification
1. Introduction
During the last two years I have certified over thirty courses of all types using the Protege counter. The example described here is that of a simple loop.
2. Course identification
3. Calibration
Tire: 700 x 20C at 105 psi
Length: 400 meters
Pre-measurement rides (69.7 degrees): 192.312, .31, .29, .29; ave, 192.30 rev .
Post-measurement rides (89 degrees): 192.09, .07, .05, .065; ave, 192.069 rev .
Constant for the day: 192.30 x 1.001 x 1000/400 = 481.23 rev/km = 774.466 rev/ml = 2406.15 rev/5km
4. Course measurement
Ride 1 (73-74 degrees): From the chosen start to a reading of 2406.15 rev, where a temporary finish was marked.
Ride 2 (76 degrees): Permanent marks were made at mile intervals of 774.47 rev. The distance from the 3-mile mark to the temporary finish was measured as 82.875 rev.
Total rev = 3 x 774.47 + 82.875 = 2406.285
The second ride gave 0.135 rev more than the first, so the temporary finish was made the permanent one.
