. Locomotive engineering : a practical journal of railway motive power and rolling stock . , of course, as the speedis being reduced, until jusl before the finalstop, when they arc about equal. This, ofcourse, is on good dry rail. It would seemfrom this (and practice will demonstrateit) that we have a good, safe margin infollowing Mr. Pratts suggestion abouttwo applications, in the manner he de-scribes—but omit the sand on first appli-cation. It may be used to good advantageon last, or final, application. But if weare passing over muddy crossings at lowspeed, it is better to waste a little mor
. Locomotive engineering : a practical journal of railway motive power and rolling stock . , of course, as the speedis being reduced, until jusl before the finalstop, when they arc about equal. This, ofcourse, is on good dry rail. It would seemfrom this (and practice will demonstrateit) that we have a good, safe margin infollowing Mr. Pratts suggestion abouttwo applications, in the manner he de-scribes—but omit the sand on first appli-cation. It may be used to good advantageon last, or final, application. But if weare passing over muddy crossings at lowspeed, it is better to waste a little more as a surface cock; third, by thoroughlycleansing the rail, it prevented, to a largeextent, the sliding of wheels on frosty,muddy or greasy rail. The contrivance consists of a pipe in-troduced into the boiler, in lieu of secondgage cock, with 54-inch opening and withglobe valve; the end of the pipe pointingtowards the rail being peened down toJ^-inch opening. It is a well-known fact that, in point ofadhesion, a clean, wet rail is almost equiv-alent to the best dry rail; and by using. Side View. SYSTEM USED ON THE CHESAPEAKE & OHIO RAILROAD FOR DISPOSING OF THE AIR-PUMP EXHAUST. mends one application, using sand, whennecessary, to create the adhesion required,and seems disposed to hang fast to thattheory; while others believe two applica-tions on sand safer, and less liable to slidewheels. Engineers, as a rule, object to usingsand from the initial reduction at highspeed, from the fact that to them it seemsa waste of that which may be veryprecious for other purposes before the tripis completed, and also that it has a ten-dency to cause the engine to warm upsomewhere. Running at a rate of 60 miles an hour,we know that the velocity of the wheels—!. e., the force that keeps them revolvins;on the rails—is four times greater thanthe braking power if fully applied; grad- air and time than to use hand, unless it isused very judiciously. Sand and mud, at best, do not go welltogeth
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroa, bookyear1892
