. Electric railways; a treatise on the modern development of electric traction, including practical instruction in the latest approved methods of electric equipment and operation . )e of truck usually have nose susj)ension, tlie of themotor resting eithcn* on the bolster of the truck or on the truck Fig. 46. .Stool Tire Wheel. There are a number of swivel trucks made which have )ly from ]M. C. B. lines, but nearly all retain the featuresof a bolster mounted by springs on a spring plank, a spring plankhung from a transom, a transom rigidly fastened to the rectan
. Electric railways; a treatise on the modern development of electric traction, including practical instruction in the latest approved methods of electric equipment and operation . )e of truck usually have nose susj)ension, tlie of themotor resting eithcn* on the bolster of the truck or on the truck Fig. 46. .Stool Tire Wheel. There are a number of swivel trucks made which have )ly from ]M. C. B. lines, but nearly all retain the featuresof a bolster mounted by springs on a spring plank, a spring plankhung from a transom, a transom rigidly fastened to the rectangidartruck frame of which it forms a part; and a truck frame with oneor more sets of spiral springs between it and the journal boxes. ELECTRIC RAILWAYS 51 Maximum Traction Trucks. A type of swivel truck tluitonce was very popular hut has largely heen superseded hy the typejust descrihed is the maximum traction truck. This truck hastwo large wheels on an axle which carries GO to 70 per cent of theweight on the truck, and two small wheels carrying the balanceof the weight. The motors are on the large wheels. Car Wheels. The car wheels most commonly used are ofcast iron. In order to make a tread and flange upon which the wearcomes, hard enough to give a good mileage, the tread and flange arechilled in the pr
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