. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . contour of the extension of thethird course with suitable clearance for expansion andcontraction and they line this rearward extension. Thevare 4 in. in outer diameter, swaged to 3 in. at their topends and enter their crown drums in exactly the samemanner as the side tubes and at the same point. The bottom of the tube is flattened and curved to fit thedry sheet and is fastened to it by a nipple 4, which isapplied from the bottom and is rolled in, and beaded andwelded on the under side. The me
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . contour of the extension of thethird course with suitable clearance for expansion andcontraction and they line this rearward extension. Thevare 4 in. in outer diameter, swaged to 3 in. at their topends and enter their crown drums in exactly the samemanner as the side tubes and at the same point. The bottom of the tube is flattened and curved to fit thedry sheet and is fastened to it by a nipple 4, which isapplied from the bottom and is rolled in, and beaded andwelded on the under side. The method is to apply the cir-culating trough and then apply the fifteen tubes on eachside that form the combustion chamber. The circulating nii)ples, 4, are then Invaded and wehled through the openends of the tul>es, after which the tube ends are closedliv the plates 5, which are welded in place, and then the•-pace block 6, by which the nipples are relieved of all>hearing action is welded in between the ends of the tube^to the dry sheet. The sides and bottom of the trough are held by staybolts. Fig. 4—Half Cross-Section of iVIcClellon Water TubeBoiler Showing Combustion Chamber and Throat Sheet after the manner of firelxjx staying and the front head is-■-tayed to the throat sheet by through stays as shown. just in front of the back tubesheet a hole 13 in. in dia-meter is cut in the Ijottom of the shell through whicli thewater enters the circulating trough to How back to thethroat and mud ring. The making of the back tubesheet involves a carefulpiece of flanging. It is flanged to the front all of theway around to take the third course of the boiler shell,and then it is flanged back to receive the three drumswliich are riveted and welded in i>lace. It will he noticedthat the flanging to the front and back is in a straight line,where the flanges for the drum reach the outer circumfer-ence. In the boiler shell there are 201 tubes of 2% in. diam-eterand 40 suj^rheater flu
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
