. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . for a railroad that uses a great dealof oil for fuel and I think the oil-burning engine is the ideal place for the super-heater, as there are no spark-arresting de-vices in the front end, just the petticoatpipe, no diaphragm or cinders to contendwith. The temperature of the front-endgases in an oil burner are undoubtedlygreater than those of a coal burner. So I think that an oil-burning engineequipped with a fire-tube superheater anda front-end feed water heater would bethe real thing and I h
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . for a railroad that uses a great dealof oil for fuel and I think the oil-burning engine is the ideal place for the super-heater, as there are no spark-arresting de-vices in the front end, just the petticoatpipe, no diaphragm or cinders to contendwith. The temperature of the front-endgases in an oil burner are undoubtedlygreater than those of a coal burner. So I think that an oil-burning engineequipped with a fire-tube superheater anda front-end feed water heater would bethe real thing and I havent been smokingany hop either, although I know that isalmost a dream. C. C. Shaw,Engineer I. & G. N. Ry. Palestine. Tex. Art of Good Wheel Boring. By Mr. H. H. Markland,P. R. R. General Shop Inspector, few words about first-class wheelboring may not be out of place. With-out a doubt, wheels should be boredhaving a true hole free from all ridgesor roughness. Ridges in wheels arevery objectionable on account of un-even strain on wheel when mounting,making a leverage that may start a. FIG. 1. WHEEL BORE CALIPERS. crack. On account of the eccentricityof rough bore of steel wheels and coreof cast iron wheels there will alwaysbe some motion of boring bar whenboring, even with the most rigid con-struction. That is, the bar will followthe hole, also when the roughing cut-ters start to go out at the bottom ofthe hole the bar will vibrate less thanwhen cutting higher up in hole whichis apt to leave a ridge in bore. Iffinishing cutters are cutting at sametime, they will make a ridge whenroughing cutters are through safe way to bore a wheel is totake a light finish cut independent ofroughing cutters. This is a point wellunderstood in machine work, butstrange to say, for wheel work thescheme of rought and finish boring allat one time is advocated principally onaccount of greater output of machines,and while it is true that many wheelsare bored very satisfactorily by th
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