. The Street railway journal . perated on short headway, and it isnecessary to accelerate them to high rates of speed in shortdistance, the resistance clue to acceleration is so large asto mask completely the frictional train resistance. This isclearly shown in Fig. 8. When these facts are consideredthe formulas check that derived by the Baldwin Locomo-tive Works very closely. This will be best shown by anillustration, taking the train of five cars of 45 tons each asmost closely approximating passenger service on steamrailroads: Resistance per Ton Davis Baldwin 6. 4-5 8. 13. May 3, 1902.]
. The Street railway journal . perated on short headway, and it isnecessary to accelerate them to high rates of speed in shortdistance, the resistance clue to acceleration is so large asto mask completely the frictional train resistance. This isclearly shown in Fig. 8. When these facts are consideredthe formulas check that derived by the Baldwin Locomo-tive Works very closely. This will be best shown by anillustration, taking the train of five cars of 45 tons each asmost closely approximating passenger service on steamrailroads: Resistance per Ton Davis Baldwin 6. 4-5 8. 13. May 3, 1902.] STREET RAILWAY JOURNAL. 561 The Baldwin formula, as compared with others sug-gested, is shown in Fig. 9. The curve actually obtainedfrom the Baldwin experiments was not a straight line, butit so closely approximated one that for convenience of cal-culation the curve was flattened so as to make a straightline. It will be noticed that Mr. Davis experiments also Motor Troubles and Trolleys Speed Resistanee. Locomotive and 25 30 35 iO 45 50 55Speed in Miles per Hour=V FIG. o 60 65 show that as the number of cars and weight of the unit in-crease the curve more nearly approaches a straight line. A Departure in Car Wiring: The Fair Haven & Westville Railroad Company, of NewHaven, Conn., has made a departure in car wiring, whichis illustrated in the accompanying diagram. As will be seen,the lamps are arranged in groups of four in multiple, in-stead of having five lamps in series, there being twentylights in the car. The arrangement has the advantage that in case a lamp At first thought the connection between motor repairsand the kind of a trolley system used, whether double orsingle trolley or underground conduit, would seem aboutas remote as some of the relationships proposed in conun-drums. A very practical proposition, however, issuggested by the experiences of the present man-II§(8+t£) agement of the Cincinnati Traction Company, andit might be presented in the following
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
