We recurrently accept for granted the rightness of speedometers. This can be a hairy and unlawful blunder. Enchanting your speedometer to an instrumentation get calibration can be gargantuan, expensive and impractical. The adjacent article provides a means to essay the rightness of your speedometer without removing it from the instrument panel.
Instructions
1. Boast a equivalent length of highway with a recognizeable mile.
2. Once you hold reached a given speed, engage your cruise control.
3. Use a stopwatch to determine the number of seconds it takes for your vehicle to travel a marked mile over that level length of highway.
5. Compare your actual mile per hour number to the speed your speedometer indicated. If the indicated speed is higher than the actual speed, the speedometer is fast.
4. Divide the number of seconds it took to drive the mile into 3,600, the number of seconds in an hour. This number is your actual mile per hour. If the indicated speed is less, the speedometer is slow.
