Recent content by PatC

A "heavy" auto on a level surface propelled by an engine, motor, wind, etc, will accelerate slower than an "light" auto propelled by the same force and all other factors being equal.

Ilyo: Absent any other consideration, rotating weight will decrease speed for a given amount of power, or at least delay acceleration to near the speed you want as a practical matter, assuming your application has enough power to attain the desired speed. (The practical application may be...

Ilyo: I am still not sure what you are trying to figure out, but without taking the drive gears apart, Danger's recommendation to count the turns of the driving and driven shaft is the easiest way to figure gear ratio. If your 180 rpm motor drives something at 90 rpm your gear ratio is 2-1. If...

The questions is not really clear. You can compute mph from rpm, if you know the distance per revolution. Check any auto with a tachometer and a speedometer. The tire diameter is part of the overall gearing. Calculate the circumference of the tire, and the vehicle will move that distance with...