. American engineer and railroad journal . least haulage resistance, the proper design of couplers and couplerclearances so as not to bind and increase the flange friction incurving and in general the rideability of the car which directlyinfluences travel and thus inversely reduces the revenues of trans-portation. The question of the real force of the value of exces-sive weight as affecting the cost of haulage is one upon which itis difficult to secure any adequate data. It would appear thoughthat, since the cost of the crew and all other operating expenses,with the exception of the fuel and l


. American engineer and railroad journal . least haulage resistance, the proper design of couplers and couplerclearances so as not to bind and increase the flange friction incurving and in general the rideability of the car which directlyinfluences travel and thus inversely reduces the revenues of trans-portation. The question of the real force of the value of exces-sive weight as affecting the cost of haulage is one upon which itis difficult to secure any adequate data. It would appear thoughthat, since the cost of the crew and all other operating expenses,with the exception of the fuel and lubricants, are independent ofthe weight, a few thousand pounds more or less per car wouldnot have much affect upon the costs of moving it when the sumtotal load is within the limits of the capabilities of the primemover. This seems to be true so long as we neglect the factorof speed. Rapid acceleration and retardation, however, demandthe lowest weight consistent with comfort and safety. Reliability.—Safety and strength with economy, are


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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering