. Railway mechanical engineer . 8 FULL THROTTLE -Indicator Cards from Locomotives 6116 with RegularWalschaert Gear connecting the radius rod as shown, a longer valve travel willresult. This causes cut-off and to occur later inthe stroke, which results in an increased mean effective pres-sure. The valve action is moreover quicker since in the samerelative time the valve travels a greater distance. A valve gear as above described was applied to a Chicago,Milwaukee & St. Paul locomotive of the Pacific type, , on June 16, 1921, and has made 40,000 miles in pas
. Railway mechanical engineer . 8 FULL THROTTLE -Indicator Cards from Locomotives 6116 with RegularWalschaert Gear connecting the radius rod as shown, a longer valve travel willresult. This causes cut-off and to occur later inthe stroke, which results in an increased mean effective pres-sure. The valve action is moreover quicker since in the samerelative time the valve travels a greater distance. A valve gear as above described was applied to a Chicago,Milwaukee & St. Paul locomotive of the Pacific type, , on June 16, 1921, and has made 40,000 miles in pas- taking away the resistance caused by lead in full cut-off, isnoticeable, while the 1/16 in. increased lead in runningnotches over that obtained from the original gear providesmore speed when hooked up. Sample indicator cars areshown of locomotive 6115 equipped with the Jones gear andof locomotive 6116 equipped with the regular Walschaertgear. These two locomotives are identical in all particularsexcept that of valve oi Wheeh Rolled Freight Car Hliecl, -14 Tr-Jiler IVheels and a 53 Rolled Steel Trailer Wheels for Locomotives Edgewater Steel Company Produces LargeSizes for Tliis Purpose—Method of Manufacture DURING recent years rolled steel wheels have come intoextensive use where steel tired wheels were formerlyemployed. The latest example of this tendency isfound in the application of special rolled steel wheels on thetrailing trucks of locomotives. These wheels have been de-veloped by the Edgewater Steel Company of Pittsburgh, Pa.,at the suggestion of an eastern railroad. This extension of the field of rolled steel wheels is due toadvantages in iirst cost and maintenance coupled with thehigh degree of reliability demanded for the most exactingservice. Formerly steel tired wheels were favored for trailertrucks because the tires could be changed readily. On mod-em locomotives the trailing axles have outside bearings andthe wheels must be dropped to change the tires. I
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
