The Economic Theory of the Location of Railways: An Analysis of the Conditions Controlling the Laying Out of Railways in Effect this Most Judicious Expenditure of Capital |
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Page 329
... grade . Any new electrical or other motor might and probably would leave the cost of power per foot - pound - which is a small matter as it is - entirely unaf- fected . But the great objection to heavy gradients on railways as at ...
... grade . Any new electrical or other motor might and probably would leave the cost of power per foot - pound - which is a small matter as it is - entirely unaf- fected . But the great objection to heavy gradients on railways as at ...
Page 337
... grade of retardation for a stop on a level grade . 2. To this quotient add the actual rate of grade , if descending , or subtract it if ascend- ing . Subtract also the grade representing the average train resistance during the entire ...
... grade of retardation for a stop on a level grade . 2. To this quotient add the actual rate of grade , if descending , or subtract it if ascend- ing . Subtract also the grade representing the average train resistance during the entire ...
Page 340
... grade resistance , although in descending it is not a resistance but an accelerating force ) bears the same ratio to the weight that the rise in any distance does to the length ac , measured on the slope , and not horizontally ...
... grade resistance , although in descending it is not a resistance but an accelerating force ) bears the same ratio to the weight that the rise in any distance does to the length ac , measured on the slope , and not horizontally ...
Page 341
... GRADES , MEASURED HORIZONTALLY AND ALONG THE SLOPE . Giving also the percentage of excess in the computed grade resistance under the rule ƒ = 20 of par . 382 . Rise in 100 . ( ab . Fig . 63. ) ( = rate of grade per cent . ) Length on ...
... GRADES , MEASURED HORIZONTALLY AND ALONG THE SLOPE . Giving also the percentage of excess in the computed grade resistance under the rule ƒ = 20 of par . 382 . Rise in 100 . ( ab . Fig . 63. ) ( = rate of grade per cent . ) Length on ...
Page 343
... grade rising 7 or a feet in 2000 , or to the " grade of repose " before explained ( par . 384 ) . It follows , therefore , that any given grade other than a level is equivalent in its mechanical effect upon the train , if it be an ascending ...
... grade rising 7 or a feet in 2000 , or to the " grade of repose " before explained ( par . 384 ) . It follows , therefore , that any given grade other than a level is equivalent in its mechanical effect upon the train , if it be an ascending ...
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Common terms and phrases
actual additional adhesion American amount assumed average axle boiler brakes cars cause centrifugal force cents per train-mile Class coal coefficient of friction computed considerable consumption curvature curve resistance cylinder decrease degree of curvature difference distance drivers effect engine repairs estimate expenditure fact feet flange freight trains friction fuel given gradients greater haul heavy important increase labor length less limits load locomotive long ton loss maintenance maximum mile run mileage miles per hour nearly number of trains operating expenses passenger trains Pennsylvania Railroad percentage practice pressure probably profit proportion pusher radius railway rate of grade ratio receipts reduce revenue rise and fall rolling friction ruling grade ruling gradient Southern Railway speed station statistics steam superelevation Table tangent tender tion tons total cost track tractive power traffic train resistance train wages train-load truck vary velocity vertical wear weight wheel-base wheels
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