 Gears: Compound Train Design Home Gears Introduction History Nomenclature Compound Train Epicyclic Gear Train Automobile Differential Resources Bibliography  Login   Home Membership Magazines Forum Search Member Calculators  Materials  Design  Processes  Units  Formulas  Math Compound Train Example To obtain the gear ratio, TV = (output rate)/(input rate), of a compound gear train, an illustrated example is presented in this section. The procedure is to start with the input, and to calculate how the angular velocity propagates through each successive intermeshing pair of gears based upon the number of teeth. Consider a compound gear train below. Suppose that the input gear speed (rotation rate) is 1600 rpm clockwise, i.e., The gear ratio between w1 and W2 is inversely proportional to the teeth numbers, n, i.e., Hence, where the negative sign represents for counter-clockwise direction. Similarly, and The final gear ratio TV can thus be obtained, Home  Membership  About Us  Privacy  Disclaimer  Contact  Advertise Copyright © 2019 eFunda, Inc.