300 



FARM MOTORS 



in their position and consequently have full power only 

 when the wind is in the direction for which they are set. 

 In those States in which these mills are used the wind 



FIG. 2O2 HOME-MADE JUMBO 



has the prevailing directions of south and northwest, and 

 for that reason the mills are generally set a trifle to the 

 west of north. 



To the casual observer the Jumbo mill (Fig. 202) seems 

 a very feasible means of obtaining power, but when one 

 considers the massiveness of the whole affair and that 

 only one-half of the sails is exposed to the wind at one 

 time, also that full power is developed from the wind only 

 when the latter is in the proper direction, it will immedi- 

 ately be seen that only in cases of dire necessity should 

 one waste much time with them. 



