Footwear impression marks { the mark made by the outside surface of the sole of a shoe (the. outsole) { are distinctive patterns often found at crime scenes. They are among the most. commonly found evidence at crime scenes and present more frequently than ngerprints.
Start with a two-gear train. To be able to determine a gear ratio, you must have at least two gears attached to each other â this is called a gear train.. Usually, the first gear is a drive gear attached to the motor shaft and the second is a driven gear attached to the load shaft.. Divide the teeth numbers of the drive and driven gears. The important thing to remember when dealing with gear trains with more than two gears is that only the driver and driven gears (usually the first and last ones) matter. In other words, the idler gears don't affect the gear ratio of the overall train at all.
Divide 336.1355 by the height of your tire in inches. Call this number P. Next, to determine your engine RPM at a certain speed (in MPH) with a certain gear ratio, you just multiply P times the gear ratio times the speed. If your tranny has overdrive, multiply that result times your overdrive ratio. 3.73 turns means 3.73 gears. 2  If you only rotate the tire once, then 1.865 turns means 3.73 gears. 3  If you turn one tire & the other one turns the same number of turns in the same direction, then you've got a good LSD or locker.