Locomotive operation; a technical and practical analysis (1904)
Henderson, G. R. (George R.), b. 1861 · Chicago, Railway Age · leaf 277
pull on the engine of 1,000 X 9>2 = 9,500 pounds (95^ 30being 2-\ or as found from plate 23). If, however, the 4same train is brought from rest to 30 miles an hour in twominutes or 120 seconds, the pull due to inertia alone will be1.000 X 24 = 24,000 pounds, as found by plate 3, or equation 2.… … Fig. 70. to overcome a given grade, although the effects of inertia, dueto a reduction in the speed, will apparently decrease the normalresistance. It is due to this certainty that calculations for en-gine rating on heavy grades are always made with less chanceof error than when the work is to be…
Locomotives
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