30 
ALTERNATING GENERATORS AND. SYNCHRONOUS. MOTORS. 
249. 
250. 
251. 
252. 
253. 
254. 
By means of Equation 41 of the Instruction Book, calculate 
the temperature rise on the field coils. 
By means of Equation 40 of the Instruction Book, caleulate 
the temperature rise on the armature. 
By means of Equation 39 and Fig. 64 of the Instruction 
Book, compare the economy in dimensions of this alter- 
nator with standard designs. 
By means of Fig. 14 of the Instruction Book, compare the 
weight of the armature stampings with that of an average 
standard design. | 
By means of Fig. 14 of the Instruction Book, compare the 
total weight of copper employed (armature and field wind-, 
ing) with that of an average standard design. 
Collect in tabular form the different data of this three-phase 
alternator in a manner similar to that done for the pre- 
ceeding example. 
Prinied am wv. 8S. A, 
