Locomotive operation; a technical and practical analysis (1904)
Henderson, G. R. (George R.), b. 1861 · Chicago, Railway Age · leaf 279
b, wc find from fornuda 3 that the forcedeveloped to assist the engine l^y the reduction of speed will1,600 — 25 aniount to 70 = 15-75 pounds per ton. The same 7,000 268 LOCOAIOTRE OPERATIOK. value is found in plate 2, at the intersection of the 40-mile curveand the 7,000-foot line. From equation… … Fig. 71. a .712 per cent grade, and tiie virtual grade is. therefore, .712per cent. This may be explained in another way. From the tablegiven in connection with equation 4. we find the velocity head at4c miles an hour to be 56 feet, and al; 5 miles, .875 feet. Thehead represented by the drop in…
Locomotives
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