. Railway age . rtliiiivliM- 24 In. IlHtnn, Htroki 20 ninmetcr of ihlvorB .>. Ilonllng Burfucc, (Irelxix Hq. ft tiibPB 1,. NUpnrhpalflr ; totiil 1, lirulp urea Wolght, empty 12!),S0n ihs. Weight In service 162,800 (?oal capacity 2 tona Water capacity 2,520 gals. Tubes, numlxT, .1 Vi In. diameter 21 Tubes, number, 1 % In. dioineter 150 Tubes, length In. Tractive effort (American foimula) 40,700 lbs. Weight on drivers Tractive effortTractive effort x diameter of drivers Heating sui faceHeating surface Firebox beating surface Total heating surface
. Railway age . rtliiiivliM- 24 In. IlHtnn, Htroki 20 ninmetcr of ihlvorB .>. Ilonllng Burfucc, (Irelxix Hq. ft tiibPB 1,. NUpnrhpalflr ; totiil 1, lirulp urea Wolght, empty 12!),S0n ihs. Weight In service 162,800 (?oal capacity 2 tona Water capacity 2,520 gals. Tubes, numlxT, .1 Vi In. diameter 21 Tubes, number, 1 % In. dioineter 150 Tubes, length In. Tractive effort (American foimula) 40,700 lbs. Weight on drivers Tractive effortTractive effort x diameter of drivers Heating sui faceHeating surface Firebox beating surface Total heating surface Weight on drivers Total beating surface Volume of 2 cylinders -= l,!.!;! cu. fl Total heating surface Volume of both cylinders Grate area Volume of both cylinders Tube hentlng surface equaled to firebox heat-ing surfuco (Viiiiglum formula), £ ioial equated firebox licatlng surface, ciclu slve of superheater, .sq. ft Total actual beating surfaceTotal equated firebox heotlng surface 4(! •Ier cent. The boiler has, except for the superheating anangemenl, nofeature of special Interest. The upper part of the boiler barrel is fitted with three rows oflarge .snioketul)rs of 4% in. inside diameter, this being reduced to1 In. near the firebox. Inserted In each of these smoke-lubes Is asuperheating unit, consisting of two sets of pipes, 1V,„ In. In diam-eter and /,. In. thick, bent in the form of an U and connected Arrangement of Superheater Dampers. at the smoke-box end to a header, thus forming a continuous double-looped tube. The steam has to pass back and forth through eachunit. The double looping of the superheater pipes has the ad-vantage of increasing the velocity of the steam through the tul) the result that the temperature of the lubes is lowered, andtheir life correspondingly increased. The open ends of each unitIn the smokebox are expanded into a common flange, which Is in-
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Keywords: ., bookcentury1800, bookdecade1870, bookidrailwayage44, bookyear1870
