. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . rites:I am one of a small band of railroadmen who have joined together for thepurpose of helping each other to learnthings that intelligent railroad menought to know. We have been discuss-ing your Correspondence School Course,but it does not last us a whole month. take Yi of the boiler pressure, and forthe low pressure cylinder J4 of the boil-er pressure. That will give you thetractive power. WHY THE LIMER r.\KT OK .\ CYLINDER \VE.\RSF.\STEST. ^77) M. A., Scranton, Pa., writes:Has any explana
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . rites:I am one of a small band of railroadmen who have joined together for thepurpose of helping each other to learnthings that intelligent railroad menought to know. We have been discuss-ing your Correspondence School Course,but it does not last us a whole month. take Yi of the boiler pressure, and forthe low pressure cylinder J4 of the boil-er pressure. That will give you thetractive power. WHY THE LIMER r.\KT OK .\ CYLINDER \VE.\RSF.\STEST. ^77) M. A., Scranton, Pa., writes:Has any explanation ever been madeof why the upper part of locomotivecylinders wear more rapidly than thebottom, which naturally should wearfaster, since it has to carry the weightof the piston? A.—We have heard andread a great many finely worked outtheories about the thrust from the mainrod putting more pressure on the topthan on the bottom of the cylinder, butwe never could see how the upper act-ing thrust passed the guides. There be-ing a larger mass of cast iron on thetop than on the bottom of the cylinder. CERMAN .SWITCH ENGINE WITH AUTOM.\TIC BELL IN FRONT OF SMOKESTACK. and ive take up other subjects betweentimes. Lately we were trying to fig-ure out the power of a balanced com-pound locomotive, but we are not cer-tain about the process. We have con-sidered the rule in your book for figur-ing the power of a simple engine, but itdoes not seem to come out right. Foran engine with cylinders 17x28x32 ins.,wc first squared the diameter of the highpressure cylinder, multiplied by thestroke and by 85 per cent, of boiler pres-sure then divided by 76, the size of thedriving wheels. The low pressure cyl-inder power we figured out in the sameway, and added the two sums togetherfor the total tractive power. The totallooks too high, so we decided to referto you. A.—The method of calculatingis all right except that the boiler pres-sure is too high. Instead of using 85per cent, of the
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
