. Railway age gazette . for-ward over the Pittsburgh division in sections. At the sametime it was thought desirable to experiment with a heavyPacific type locomotive for passenger service on this has accordingly been designed and built a Mikado typelocomotive which bears the railway companys classification Lisand a Pacific type designated as class K4s. It was necessary to keep the locomotives within certain limits. rear driving wheels. The boiler is of the Belpaire type, andhas 237 2J4 i. tubes, and 40 Syi in. superheater flues, all ofwhich are 19 ft. long. The firebox is 126 in
. Railway age gazette . for-ward over the Pittsburgh division in sections. At the sametime it was thought desirable to experiment with a heavyPacific type locomotive for passenger service on this has accordingly been designed and built a Mikado typelocomotive which bears the railway companys classification Lisand a Pacific type designated as class K4s. It was necessary to keep the locomotives within certain limits. rear driving wheels. The boiler is of the Belpaire type, andhas 237 2J4 i. tubes, and 40 Syi in. superheater flues, all ofwhich are 19 ft. long. The firebox is 126 in. long by 80 , and is fitted with a combustion chamber; the grate areais 70 sq. ft. The inside diameter of the boiler at the forwardend is JSyi in., with an inside diameter of 87 in. at the domecourse. The dome is flanged in one piece. The design ofsmoke stack employed is the result of much study, and an in-side extension is used extending below the center line of thesmoke box. as will be seen from the Latest Development of Pacific Type Locomotive on the Pennsylvania because of restrictions in road clearance, and make the revolv-ing and reciprocating parts as light as possible consistent withthe necessary strength; the weight per pair of driving wheelsis limited to lb., with a 5 per cent margin for scalevariations, and there is also a limitation for dynamic augmentdue to counterbalance for reciprocating weights, of 30 per centof the weight on drivers at 70 miles an hour for passenger loco-motives and at 294 revolutions per minute for freight loco-motives. Interchangeability of parts between the two loco- AND RUNNING GE.\R The frames are of cast steel, 6 in. wide and reinforced to 8in. over the driving boxes. Heat treated steel has been usedwherever possible following the same lines in this respect as inthe E6s Atlantic type locomotive previously referred to, amongthe parts in which this material has been employed being thedriving axles, crank p
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1913
