. Railway mechanical engineer . d the roof sheet The same- procedure was followed as in the previous test,and here again it was shown that the expansion of the outersheet was greater in every case than that of the inner following table shows the results of these tests: Hark 1 Outside Wrapper Sheet Location Expansion - ■ .Ibin. i 12 —Side Sheet 1 4 in. Inside of Firebox Difference LocationSheet-Side Sheet. Expansion• in. ...3/32 in. Expansion1/16 in. throat sheet and passing through the uuter throat sheet, asindicated in Fig. 1, that the inner tube sheet
. Railway mechanical engineer . d the roof sheet The same- procedure was followed as in the previous test,and here again it was shown that the expansion of the outersheet was greater in every case than that of the inner following table shows the results of these tests: Hark 1 Outside Wrapper Sheet Location Expansion - ■ .Ibin. i 12 —Side Sheet 1 4 in. Inside of Firebox Difference LocationSheet-Side Sheet. Expansion• in. ...3/32 in. Expansion1/16 in. throat sheet and passing through the uuter throat sheet, asindicated in Fig. 1, that the inner tube sheet moved outward3/32 in. when the fire was first started and before the circu-lation was fully established, and later when steam pressurebegan to rise, backward about 1/16 in. The first movementof the needle throws some light on the cause of the side sheetpopping out along the fire line as they sometimes do. At the left in Fig. 4 is shown an installation of flexibleStaybolts which, when adjusted as shown by the table under-. fOfSif cjreif //reirtjfs /tfx/stt sotrj. Fig. 4—Application of Flexible Staybolts to Relieve Working Stresses in Locomotive Fireboxes 4—Side Sheet 3/16 in. 5—Side Sheet 7/32 in. 6—Wagon Top 7/32 in. 1—Thioat Sheet 5/32 in. 2—Throat Sheet 3/16 in. Side Sheet 1/8 in. 1 16 in. Side Sheet 1/8 in. 3/32 in. Crown Sheet 5/32 in. 1/16 in. Tube Sheet 7/64 in. 3/64 in. Tube Sheet 1/8 in. 1/16 in. This would seem to account for the breakage of the backhead and throat sheets along the outer row of staybolts, also
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
