. The street railway review . this was considered desirable. An interurban car body, 32 ft. long without vestibules, rolls freelyupon rails screwed to the flat car floor. This body with a specialsteel vestibule and a standard vestibule was supplied by the J. Co. tnder the side sills of the dynamometer body aremounted eight Chapman double-ball bearings and- these carry fouraxles of 3 7-16 in. diameter, 9 ft. long. Upon the axles are speciallychilled wheels, 12 in. in diameter with ground treads. The railsare also ground where they come into contact with the wheels. Bythis method of moun
. The street railway review . this was considered desirable. An interurban car body, 32 ft. long without vestibules, rolls freelyupon rails screwed to the flat car floor. This body with a specialsteel vestibule and a standard vestibule was supplied by the J. Co. tnder the side sills of the dynamometer body aremounted eight Chapman double-ball bearings and- these carry fouraxles of 3 7-16 in. diameter, 9 ft. long. Upon the axles are speciallychilled wheels, 12 in. in diameter with ground treads. The railsare also ground where they come into contact with the wheels. Bythis method of mounting there is, for practical purposes, no frictionbetween the body and the flat car floor. The l)ody is restrainedfrom excessive motion by various effective safety devices. Thejiressure of the air upon the body is measured by means of scalebeams, constructed for the tests by Fairbanks, Morse & Co. andlent by them. The beams are supplied with dashpots, and theweighing mechanism consists of Ihe regular beam with weights and. \^ rt .t^
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
