. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . is of excep-tionally light construction. The main rods are of I section and 7j4 in. deep at therear end and 7 in. at the front, with a 5j/2-in. milledsection of the rod maintained throughout the flanges are 4^4 in. wide and taper from a thicknessof ^4 in. at the front end to 1 in. at the Lack. Special care has been exercised in designing the re-ciprocating parts in order to keep the weight as lowas possible. The efforts in this direction have beenvery successful in that the weight
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . is of excep-tionally light construction. The main rods are of I section and 7j4 in. deep at therear end and 7 in. at the front, with a 5j/2-in. milledsection of the rod maintained throughout the flanges are 4^4 in. wide and taper from a thicknessof ^4 in. at the front end to 1 in. at the Lack. Special care has been exercised in designing the re-ciprocating parts in order to keep the weight as lowas possible. The efforts in this direction have beenvery successful in that the weight of these parts forone side have been reduced to 1,008 lbs. or less thanone-half of one per cent, (actually per cent) ofthe weight of the locomotive. This gives a piston pres-sure of 92 lbs. per pound of reciprocating parts. Thislight weight of reciprocating parts and the consequentreduction in the weight of the counterbalance, enablesthe engine to maintain a speed of 70 miles per hour. The throttle is of the floating stem type with a drift-ing attachment, a design which is exceptionally easy. Cross Section of Cylinder for Ten-Wheeled Locomotive of thePennsylvania Railroad to Operate and responds instantly to any movement ofthe throttle lever in the cab. The details of the con-struction are clearly shown in the engraving. Themain valve A is seated on a bushing set into the topof the standpipe and is keyed by the key B to a hollowcylindrical projection rising al>ove the center of thebalancing piston C. The central portion of the valveis bored out to receive the upper end of the throttlestem which has a limited amount of vertical motiontherein and is provided with jjacking rings to prevent asteam leakage. The stem has a slot cut in it to span the key B andallow for a certain amount (ji motion. The stem car-ries the pivot valve D which seats on the lower side ofthe throttle pipe. The engraving shtnvs the throttleclosed. The first movement of the throttle lf\er lifts the pi
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
