Excerpt from Locomotive Operation: A Technical and Practical Analysis
The object of this work is to give a complete and systematic discussion of the theory and practice of locomotive operation. By this is meant the work or results accomplished by a locomotive in motion, together with the effect upon itself and the track, and the amount of fuel and water needed to perform such work, rather than an exclusive treatise upon the mere manipulation of the machine, though the latter naturally forms a part of the study in connection with the proper manner of procuring certain results.
The order in which the different conditions are taken up is somewhat at variance with the usual custom. Inertia is first considered, as this property is inherent in all bodies having motion of a variable character. The Action of the Steam is next examined in detail, as to its power of producing rotation and strains in the various members of the mechanism. Resistance naturally follows, as it must be overcome by the action of the steam. This leads us to Slipping and Braking, which are the logical outcome of the previous studies.
These prepare us for an examination of the Hauling Power at slow speeds, but in order to consider high speeds, the steam capacity of the boiler must be determined, which is first undertaken. As the principal business of the locomotive is to haul trains, this is the most important chapter of the treatise, and it is placed in this part of the work, so that the various factors by which it is governed might be studied in an elementary manner before the complication necessary for a complete understanding of it is encountered. After this follow determinations of the water and fuel consumption under different conditions, and their economical use.
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