. The trackman's helper, a handbook for track foremen, supervisors and engineers . afterward. Table of elevation of outer rail on curves in inches. Speed in Miles per Hour Degree ofCurve CD *g 02 o s CO o COa; s oto m Of! i 1 .. 2 ... ■ % ■ % ■ %. 1 • IVs . 1% ■ 1% • ly. • 1% • lys V2%1 iy4;% IVs^Vs2%2% 2y83y8 % Vs iy4 1% 2 3% 4y8 ^V2 %lys1% 2%3 3y2 4y8 4% 5y8 1% 2% 3y4 4 4y8 5% lys2y83y84y4 5y4 1% 2%4 5% 1%3y4 4% 2 4 2%4% 3 ... 6 7y8 4 . . 6% 8 5 ... 6% 8y4 6 ... 6y4 8 7 ... 7% 8 ... 6y. 9 ...10 ... 7y4sys 11 ... 6y. 12 ... 7y8 Note.—The figures above the heavy black line are the on
. The trackman's helper, a handbook for track foremen, supervisors and engineers . afterward. Table of elevation of outer rail on curves in inches. Speed in Miles per Hour Degree ofCurve CD *g 02 o s CO o COa; s oto m Of! i 1 .. 2 ... ■ % ■ % ■ %. 1 • IVs . 1% ■ 1% • ly. • 1% • lys V2%1 iy4;% IVs^Vs2%2% 2y83y8 % Vs iy4 1% 2 3% 4y8 ^V2 %lys1% 2%3 3y2 4y8 4% 5y8 1% 2% 3y4 4 4y8 5% lys2y83y84y4 5y4 1% 2%4 5% 1%3y4 4% 2 4 2%4% 3 ... 6 7y8 4 . . 6% 8 5 ... 6% 8y4 6 ... 6y4 8 7 ... 7% 8 ... 6y. 9 ...10 ... 7y4sys 11 ... 6y. 12 ... 7y8 Note.—The figures above the heavy black line are the onesordinarily used in practice. ELEVATION OE CURVES 233 Rail benders. There are two general types of railbenders, one operated by the section men by hand andthe other by power mounted on a flat car, the railsbeing pulled through the bender from another flat carto a car on which they are stored or from which theyare distributed upon the ground for laying. Thepower for doing the pulling may be obtained eitherfrom the locomotive or a hoisting engine mounted on. Fig. 45. Vaughan Eail Bender another car. The common type of curver consists of asemicircular steel yoke, a strap connecting the jaws ofthe yoke and a plunger between the yoke and the strap,whose position can be regulated by a threaded endwhich passes through the yoke and a nut abuttingagainst it. The curving is accomplished by the pres-sure upon the side of the rail of three wheels, two ofwhich are located at the intersections of the strap andthe yoke, and the third is carried by the plunger. The 234 THE TRACKMANS HELPER rails are pulled between these wheels, the amount ofcurve being regulated by the position of the plunger. With one of these machines, described in the Decem-ber 18, 1914 number of the Railway Age Gazette, itwas found that 20 rails per hour or 200 per day could
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