. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . gradual. With the regenerative brakingof trains lessens the duty on the air brakeequipment, further safety in braking withelectric engines is introduced with theaxle-driven generators. These ma-chines are mounted on the pony trucksof the locomotive, and in additionto exciting the motors during regenera-tion, furnish the power for operatingthe air compressors and blower motorswhen tin- locomotive is hauling. Thismethod insures a current supply tothe air compressor motors irrespective ofthe ove
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . gradual. With the regenerative brakingof trains lessens the duty on the air brakeequipment, further safety in braking withelectric engines is introduced with theaxle-driven generators. These ma-chines are mounted on the pony trucksof the locomotive, and in additionto exciting the motors during regenera-tion, furnish the power for operatingthe air compressors and blower motorswhen tin- locomotive is hauling. Thismethod insures a current supply tothe air compressor motors irrespective ofthe overhead trolley supply, and proi Mrs that compressed air will always be available for use of the air electric locomotives without connect-ed wheels, weight transfer due to tractiveeffort is an important thing. This iscaused by the drawbar-pull being exertedat the coupler height, which, with the re-action at the rail, tends to lift the lead-ing end and depress the trailing changes the weight distribution andincreases the tendency of the wheels toslip. The method of equalization de-. TWIN MOTOR WITH QUILL DRIVE. scribed above reduces the weight varia-tion on the driving wheels to only 6 percent from normal, when pulling at 30 percent adhesion, as is possible with electriclocomotives owing to the steady andgradually increasing torque of the ma-chine. The question of passenger train heat-ing is of vital importance due to extremeweather conditions encountered in that
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