CONSTRUCTION OF CIRCLE DIAGRAM 201 



necessary, in the no-load test, for the purpose of determining the 

 frictional loss as already explained. 



FIQ. 131. Construction of Circle Diagram from Experimental Data. 



By drawing a vertical line through U, we are able to determine 

 the dispersion coefficient a of the motor, given by ( 110) 



AF 



117. Construction of Torque Circle and Slip 

 Line. Scales for Torque and Slip 



We next describe the torque circle on OB as diameter, join OF 

 and produce it to meet the circles in K. The torque is, to a certain 

 scale, given by the length of the perpendicular let fall on OK from 



