. The railroad and engineering journal . e finallocation provided for the introduction of sections of 10 and12 per cent, grade, to be worked on the Abt rack-rail sys-tem. The total length of the road is miles, and the Zer-matt terminus is 3,220 ft. higher than the starting point atViege, the average rise being ft. per mile. Themanner in which the rise has been distributed and thegrades arranged is shown in the accompanying profile, , in which the rack-rail sections are shaded. The mini-mum radius of curvature is 197 ft. The line is of i-meter ( in.) gauge. The rails are49
. The railroad and engineering journal . e finallocation provided for the introduction of sections of 10 and12 per cent, grade, to be worked on the Abt rack-rail sys-tem. The total length of the road is miles, and the Zer-matt terminus is 3,220 ft. higher than the starting point atViege, the average rise being ft. per mile. Themanner in which the rise has been distributed and thegrades arranged is shown in the accompanying profile, , in which the rack-rail sections are shaded. The mini-mum radius of curvature is 197 ft. The line is of i-meter ( in.) gauge. The rails are49 lbs. to the yard, of steel, and are laid on steel ties of thePost or box type ; these ties are of steel, and weigh 83 The rack-rail on the Abt system consists of twoplates, each i in. thick for gradients of 10 per cent, and 5*4 THE RAILROAD and: [becember, 189!. upward, and ^ in. thick for gradients between 7 per cent,and 10 per cent. The entrance points of the rack-rail,being carried on springs borne by each sleeper and con-. nected by a link of I m. ( in.) in length to the next rail,allow for such slight variations in position as will accom-modate the pinions on the axles of the engine. This ar- rangement permits the engine to enter the rack withoutslowing down locomotives are adapted to both the ordinary and the rack-rail. They havefour driving-wheels coup-led, a pair of trailing-wheelsbehind the fire-box, sidetanks and a coal-box on therear end. The driving-wheels are in. in di-ameter, and the trailing-wheels in. These ad-hesion wheels are driven byoutside cylinders diameter and •stroke. The driving-wheelsare spaced 6 ft. in. be-tween centers, and the totalwheel-base is 14 ft. boilers have a totalheating surface of 705 ; the grate area is 13sq. ft., and the workingpressure 170 lbs. The pinions for workingon the rack-rail are underthe engine ; there are twoof them, connected by par-allel rods
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
