Question: Flow to the motor, and subsequently the output speed, does influence torque output for some motor designs. Data shown in Table give the output torque from a "family" of motors as flow to the motor increases from 1 to 20 GPM. (A family of motors is a group of motors with the same design, but the size of the components have been increased to give a range of displacements.) Pressure drop across the motors was maintained constant at ?P = 1000 psi for all tests. Plot the torque efficiency vs. input flow for the four smaller motors (4.9 to 9.6 in3/rev) on one plot and the four larger motors (11.9 to 24.0 in3/rev) on a second plot. Discuss your results.
