. American engineer and railroad journal . OF LARGE CAPACITY. For testing large Mallet compound locomotives a dynamome-ter car is required of considerably larger capacity and of con-siderably greater strength of undcrframc than has been neces-sary in the past. The Chicago, Milwaukee & St. Paul Railway,desiring to obtain accurate information concerning the resultsof some Mallet compounds which were on order, designed andbuilt at its shop at West Milwaukee the dynamometer car whichis shown in the accompanying illustrations. These designs amount of blipping and in fact conditions wherei
. American engineer and railroad journal . OF LARGE CAPACITY. For testing large Mallet compound locomotives a dynamome-ter car is required of considerably larger capacity and of con-siderably greater strength of undcrframc than has been neces-sary in the past. The Chicago, Milwaukee & St. Paul Railway,desiring to obtain accurate information concerning the resultsof some Mallet compounds which were on order, designed andbuilt at its shop at West Milwaukee the dynamometer car whichis shown in the accompanying illustrations. These designs amount of blipping and in fact conditions wherein thespring dynamometer is reasonably satisfactory, particularly whenthe very great difference in original cost of apparatus and o)the extreme care necessary for its proper maintenance is con-sidered. In the present case the dynamometer consists of twosets of four springs each, the springs being made of i 3/16 inchbar and having a height of 10 in. when under the initial com-pression of TOO lbs. Its total compression for the ma.\inium. NEW DVXAMipMKTKK ( AR (iF I POUNDS C.\PACITY DESIGNED .\ND BUILT liV THE C. M. & ST. P. RV. were drawn up in the mechanical engineers office, under thesupervision of J. F. DeVoy, assistant superintendent of motivepower, and while incorporating no radical departures from thecustomary arrangement where a spring dynamometer is car was evidentlj well fitted for the most severe and heavyservice that it has since been .;alled upon to undergo. Although the oil cylinder dynamometer is generally consid-ered the best suited for this class of work, its advantages arenot as great when used with the Mallet compound type of loco-motive as with the ordinary simple engine. The former givesa very steady, even pull, is not subject to any consider^ible capacity of 110,000 lbs. is in. This gives a total movementof inches to the pen point. An inspection of the drawing will show that an underframehas been designed for this car which will assur
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
