. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . 60 lbs. 60 30,000 lbs. 60 44,100 lbs. 90 -161,000 LBS. GROSS LOAD 19,200 lbs. 60 24,600 lbs. 60 30,000 lbs. 60 56,700 lbs. 90 LBS. GROSS LOAD 31,800 lbs. 60 67,500 lbs. 90 Per Cent Cars Represented ferred to occurs only on long continuousgrades and not through the short appli-cation of brakes required for stoppingtrains. It is well known that aside fromthe very ditTercnt condition with respectti> the heating oi h heels, engine tenderservice
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . 60 lbs. 60 30,000 lbs. 60 44,100 lbs. 90 -161,000 LBS. GROSS LOAD 19,200 lbs. 60 24,600 lbs. 60 30,000 lbs. 60 56,700 lbs. 90 LBS. GROSS LOAD 31,800 lbs. 60 67,500 lbs. 90 Per Cent Cars Represented ferred to occurs only on long continuousgrades and not through the short appli-cation of brakes required for stoppingtrains. It is well known that aside fromthe very ditTercnt condition with respectti> the heating oi h heels, engine tenderservice is especially severe on account ofthe high center of gravity, short wheelbase, shifting load and jerks from thedraw bar. Taking into consideration the condi-tions stated aliuve. without going intothe theory of the relation of stresses inthe wheel to increased braking powerwhich has been quite definitely established,suffice it to say. that in order to producethe proper factor of safety for variousclasses of service, the following wheelweights are what should be used andeventually will be FIG. 1. EXCESSIVE BRAKE BURNING AND TREAD. In the above table it will be seen thatin heavy freight service the braking powerof each car is from 15 to 17 per cent, ofthe gross load, whereas in engine tenderservice, the braking power is 33 per cent,of the gross load. This indicates that theheating effect in the wheel is twice asgreat in engine tender as in freight serv-ice, and this fact must be considered whenestablishing standards for engine tenderservice. It is understood that the heating re- present Standard Proposed Standard for Engi ne Tender Heavy Service. Sue of and Journal, Pass Service. Freight. Eng. Tdr. Inches. Lbs. Lbs. Lbs. 44 X 8 625 675 725 5x9 6-5 725 77S 5V5 X 106 X 11 -25 775875 825950 While the -Am. Ry., and the M. have ne^er, in their recommendedpractice, considered any standard differ-ing from the M. C. B. designs for equiva-lent wheel loads, many
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
