. Railway mechanical engineer . ,4702,,135 Drawbar pulls (lb.) ,50060,50057,50053,,00032,50029,50028,00026,00023,50020,000 Dynaniomr plus engine and tender, r grade resistance 66,585 66,585 63,585 59,585 53,585 44,085 38,470 36,130 33,125 31,470 .135 Maximumcalculated66,82066,82066,82065,00059,,30041,90038,49035,74532,60030,60026, plotted along the drawbar pull curve are values of thedrawbar pull recorded by the dynamometer car, correctedfor the grade resistance of the locomotive and tender. It
. Railway mechanical engineer . ,4702,,135 Drawbar pulls (lb.) ,50060,50057,50053,,00032,50029,50028,00026,00023,50020,000 Dynaniomr plus engine and tender, r grade resistance 66,585 66,585 63,585 59,585 53,585 44,085 38,470 36,130 33,125 31,470 .135 Maximumcalculated66,82066,82066,82065,00059,,30041,90038,49035,74532,60030,60026, plotted along the drawbar pull curve are values of thedrawbar pull recorded by the dynamometer car, correctedfor the grade resistance of the locomotive and tender. It isinteresting to note how closely tlie calculated and actualdrawbar pulls correspond. At the higher speeds the valuesfound in the test fall below the curve due to the fact thatthe locomotive was not worked to its full capacity at thesespeeds. Some of the details of the engine performance aregiven in Table II. The horse power curve is aLso shown in Fig. 1. A maxi- Gun Iron Prshn ffings Taper of Key 4 ^Sr T /• J frnishedMOKr-r. Secfion of and Rod for the U. P. 2-10-2 Type Locomotives mum of 2,940 indicated horsepower was developed at a speedof 30 miles an hour. At higher speeds the horsepowerdecreased somewhat. When working at its greatest capacitythis locomotive developed one horsepower for each weight, which is a very creditable performance. Repre-sentative indicator cards taken at various speeds are shownin Fig. 2. The average tonnage handled on the test trips betweenOgden and Evanston was 1,800 gross tons excluding theengine and tender. The average speed while running was15 miles per hour. The coal used was 24 in. screenings £;alIons, the equivalent evaporation per pound of coal lb. The principal dimensions, weights and ratios follow: Data Gage 4 ft. 8V5 in. Service Freight Fue: Coal or oil Tractive effort 70,450 lb. Weight in working order 357,600 lb. Weight on drivers lb. Weight on leading truck 1b. Weight on t
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
