. American engineer and railroad journal . Fit. for Compound Mastadon Locomotive. grade,panying The data relating to the diagrams is given in the aocom-table: DATA FOR INDICATOR DIAGRAMS GIVEN IN FIG. 5. a = 3 a . ■o 0 a ■ % oa II o655 I3 Kb —= 5) oX to. a. 29 20 100 200;. 349. 14 open. 48 90 450 200 : . 960 32 56 280 Jin 818 wide open 68 61 320 _>i/l 785 % open. 98 102 16 7 510 200 1,0151 wide open. 99 118 590 i9s: 101 in 570 195 904 56 7 112 86 430 195 1,001 135 112 560 195 1,2?0 52 0 It should be not
. American engineer and railroad journal . Fit. for Compound Mastadon Locomotive. grade,panying The data relating to the diagrams is given in the aocom-table: DATA FOR INDICATOR DIAGRAMS GIVEN IN FIG. 5. a = 3 a . ■o 0 a ■ % oa II o655 I3 Kb —= 5) oX to. a. 29 20 100 200;. 349. 14 open. 48 90 450 200 : . 960 32 56 280 Jin 818 wide open 68 61 320 _>i/l 785 % open. 98 102 16 7 510 200 1,0151 wide open. 99 118 590 i9s: 101 in 570 195 904 56 7 112 86 430 195 1,001 135 112 560 195 1,2?0 52 0 It should be noted that diagrams 29 and 48 were taken while thelocomotive was working as a simple engine. All the diagramsare of interest as being taken from what is probably the largestpair of compound cylinders thus far introduced into locomotivepractice. The enormous power of the engine can be realizedwhen it is noted that at a speed of only miles per hour it in-. Boiler for Compound Mastadon Locomotive. cated 1,230 horse-power. The tractive effort at the rail in thiscase (card No. 135) can be calculated thus :33,000 X 1,330 x 60 = 5,280 X l from which must be deducted the engine friction, which, if taken at 12| per cent, of the total power, leaves a tractiveeffort attherails of about 22,000 pounds. This is enormous for a speed ofover 18 miles per hour. Performing the same calculation forcard No. 29, taken with the engine working simple, and wefind the tractive effort, after deducting engine friction, to be inround numbers 35,000 pounds. This figure indicates what maybe expected from this engine at slow speeds, as shortly afterstarting, or when working on heavy grades. As the weightupon the drivels is 150,000 pounds, it is interesting to note thatthe ratio between that weight and the tractive effort at the mo-ment the card referred to was taken was to 1. This figureought to interest one of our English contemporaries, who assumesa rati
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
