. American engineer and railroad journal . enthe frames, with crank axles, have been in successful and almostuniversal use in England and France for two generations, andare also used extensively in other European countries. As it isnot customary to overload engines in England and on the Con-tinent, nor keep them on the road when they require shop atten-tion, and as great armies of men and inspectors are continuouslyemployed keeping each engine in the pink of condition, the diffi-culties of rough American usage do not occur; when Americansattempt to use fine machines of these typ^s under their
. American engineer and railroad journal . enthe frames, with crank axles, have been in successful and almostuniversal use in England and France for two generations, andare also used extensively in other European countries. As it isnot customary to overload engines in England and on the Con-tinent, nor keep them on the road when they require shop atten-tion, and as great armies of men and inspectors are continuouslyemployed keeping each engine in the pink of condition, the diffi-culties of rough American usage do not occur; when Americansattempt to use fine machines of these typ^s under their roughconditions, without the care and attention given abroad, manybad features develop, among which may be mentioned the pound-ing, heating and rapid wearing out of round of the inside crankpins. On European railways these pins are not allowed to run hot,nor to get into a condition where they do run hot, and whatslight wear does result is taken up by either careful hand work,or by machines of which the accompanying illustrations ( Figs. 4. -Santa Fe, Tupeka, Kan. FIG. 2.—RECENT DESIGN OF BUILT UP SEM1-Z CKANK AXLE. and 5) are a type. These machines require the wheels and axleto be removed from the engine. With the introduction of the balanced compound, or insidecrank locomotive, in this country, the early troubles incident toundue wear of these pins were met either by hand work, or, asthere were no examples of European locomotive inside crankturning machines available in this country, by the constructionof special types of crank pin turning machines, according toAmerican standards of machine construction. The limited space between the frames of an American locomo-tive, into which the high pressure cranks must be crowded,makes it impossible to use a crank of proper proportions to resistwear and prevent heating and pounding. The rapidity with which the high pressure crank pins of abalanced compound locomotive are worn out of round is oftensurprising. This is especially true wit
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
