ESTIMATION AXD f'OXTROL OF OPKRA'1'1'. 11 Mi; OF IIKI.AVS 157 



20 



2 2 



30 40 50 60 80 100 



Fig. 6 — Mass controlled operate time tests. 



root than the cube root of the power ratio, developed in Part I, for the 

 mass controlled case. This is partly attributable to the fact that waiting 

 time is included, and partly to the fact that the 2.3 watts case is in the 

 transition range between mass and load controlled operation. 



For the operating region where coil constants are larger than the best, 

 the time curves are parallel and increasing. Considering any one vertical 

 line representing a particular winding, increasing the power by increasing 

 the battery voltage will alw^ays decrease the operate time. For curves 

 plotted as in Fig. 1, where the battery \^oltage is kept constant and the 

 time curves are plotted with winding turns as the independent variable, 

 parallel curves again obtain. Thus an increase in circuit power obtained 

 by keeping the voltage constant and reducing the circuit resistance 

 always will reduce the operate time. Conversely, adding any series 



