. Electric traction for railway trains; a book for students, electrical and mechanical engineers, superintendents of motive power and others .. . Ficj. 88.—Buffalo and Lockport Freight Unit. Two used Since 1898.. Fig. 89.—Busii Terminal Railroad Freight Locomotive, DESCRIPTION OF DIRECT-CURRENT LOCOMOTIVES 309 Two swivel trucks are used, with equalized side-bar frames similar tothose in general use for coal-tender trucks of steam locomotives. Thebolsters are carried rigidly on the side frames, the weight being trans-mitted thru one semi-elliptic spring on each side. Axles are 6-inch,drivers ar
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. Electric traction for railway trains; a book for students, electrical and mechanical engineers, superintendents of motive power and others .. . Ficj. 88.—Buffalo and Lockport Freight Unit. Two used Since 1898.. Fig. 89.—Busii Terminal Railroad Freight Locomotive, DESCRIPTION OF DIRECT-CURRENT LOCOMOTIVES 309 Two swivel trucks are used, with equalized side-bar frames similar tothose in general use for coal-tender trucks of steam locomotives. Thebolsters are carried rigidly on the side frames, the weight being trans-mitted thru one semi-elliptic spring on each side. Axles are 6-inch, drivers are 33-inch. Rigid wheel bases are 6 feet 6 inches; total wheelbase 22 feet; and total length 30 feet. Motors consist of four 90-h. p., 2-turn, direct-current, 500-volt units, with a 2.47 gear ratio. A pantograph trolley is used to prevent frequentreversals, in switching service. In 1907, and in 1911, locomotives of the same type were purchased.These are 40-ton machines with the same size of motor. The gear ratiois 3.53 and the drivers 36 inches. Weight of electrical equipment is14 tons. Performance characteristics for the 1904 machine show a tractiveeffort of 20, 000 pounds at 9 m. p. h., with 800 amperes
