. Locomotive engineering : a practical journal of railway motive power and rolling stock . , where thejaw of the catch works (youll think thissounds botchy). I know of anotherEnglish line that would save hundreds is of course needless to allude tothe safety thereby gained. If a maincrank pin runs hot, the drivers nose giveshim timely warning, and he can alwaysact in time to avert a catastrophe, touse a newspaper expression. But withiron or steel bearings the case would bedilTcrent. Theres no give about them;no half-way measures, so to speak; di-rectly they go wrong the damage certain
. Locomotive engineering : a practical journal of railway motive power and rolling stock . , where thejaw of the catch works (youll think thissounds botchy). I know of anotherEnglish line that would save hundreds is of course needless to allude tothe safety thereby gained. If a maincrank pin runs hot, the drivers nose giveshim timely warning, and he can alwaysact in time to avert a catastrophe, touse a newspaper expression. But withiron or steel bearings the case would bedilTcrent. Theres no give about them;no half-way measures, so to speak; di-rectly they go wrong the damage certain superintendent of motive powerin England once tried steel little-endbearings, and they made a grand job, untilone day one of them got the chill off, andthen—well, the whole side of the enginewas torn down. It was all right whilsteverything kept cool; there was no har-bor of refuge, however, in the time oftrouble, as with brasses: when the thinggot hot, something had to happen. Afterthis one breakdown, steel bearings weredropped like a hot potato. I believe that, in a good many LocoDioUte EngineeringWILEYS AITARATUS. of dollars a year if they had Webbs whitemetal, if only for their main rods. Illtell you about this some other time. Now, I dont want you to think I amdecrying babbitt: but some people havean exaggerated sense of its all right where not exposed to sando- grit. Its adoption is, in fact, in keep-ing with the principle governing the useof all bearing alloys, namely, to transferthe wear from a surface you cant renewto one you can. We therefore deliberatelymake the latter the softer material, so asto throw the onus of the wear upon , it is more easy to renew a valvethan a valve seat; and if the former ismrde of bronze, it will wear in preferenceto the latter. This idea is carried still fur-ther on some English roads, by drillingthe face of the valve full of !/2-inch holesand filling up with babbitt. This wasdone in the case
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Keywords: ., bookcentury1800, bookdecade1890, bookidlocomotiveen, bookyear1892
