. Eisenbahnmaschinenbauingenieur . Kammer; und die derzeit verwendetenKonstruktionen erlauben eine Bewegungsfreiheit, die nicht mit dem geraden Schornstein fest am Schlammring befestigt werden kann. Das Vorwärtsbewegen des Schornblattes mit der Installation der Kammer verringert auch die Temperaturen, denen es unterliegt, und verringert die breiten Temperaturschwankungen, die ständig in der gewöhnlichen Feuerstelle auftreten und die die Quelle der meisten unserer Rauchprobleme sind. Die Verstopfung von Schächten ist auf unvollkommene Bedingungen der Feuerstelle zurückzuführen – und alles, was getan werden kann, um die thor-Oughness der Verbrennung zu erhöhen

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. Railway mechanical engineer . chamber; and the designs at present usedpermit a freedom of movement that cannot be had with thestraight flue sheet rigidly secured to the mud ring. Moving the flue sheet forward with the installation of acombustion chamber also reduces the temperatures to whichit is subject, and reduces the wide variations in temperaturewhich are constantly occurring in the ordinary firebox, andwhich are the source of most of our flue troubles. The plugging of flues is due to imperfect firebox condi-tions—and anything that can be done to increase the thor-oughness of combustion will reduce these troubles. Com-bustion chambers do increase the effectiveness of combustionand reduce the trouble due to flues honeycombing. Entirely apart from all theoretical considerations, the ques-tions which you have raised point the way to developmentsthat will make the locomotive not only a more efficient ma-chine in service, but one that is more practical and economicalfrom a maintenance standpoint. J- T. .thony.. X. Y. C. 4-8-2 Type Freight Locomotives Over 2, 600 Drawbar Horsepower Has Been Devel-oped; Capacity at High Speeds Is Well Sustained CONSIDERABLY more than a year ago the New YorkCentral received from the American Locomotive Com-pany its first order of 30 locomotives of the 4-8-2type, which in several respects are the most notable locomo-tives of this r-pe yet built. Since that time orders havebeen placed for more of these locomotives until at presentthere are nearly two hundred of them either in service oron order. Heretofore locomotives of this wheel arrangement invaria-bly have been built to handle heay passenger trains overmountain grades under conditions making difficult the main-tenance of schedules with Pacific tpe locomotives. Locomo-tives of this wheel arrangement have therefore come to beknown as the Mountain t-pe. On the Xew York Central, however, the 4-8-2 tjpe locomotives have been built for freightservice on a line with comparatively few

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• bookcentury1900
• bookdecade1910
• booksubjectrailroadengineering