. Railway mechanical engineer . ube in Road Service, WestAlbany to Rotterdam Jet. templet was fitted over the side of the boiler, as shown inFig. 6, when the boiler was cold. It was firmly clamped atits center to the boiler. The fit was very carefully made, aman working nearly a week to have it absolutely engine was then fired up and the effect of heating up theboiler to the point where 200 lb. of steam was obtained causedthe wrapper sheet to bulge out so that there was 3/32 between the templet and the wrapper sheet at bothends of the templet. This, it seems, explained
. Railway mechanical engineer . ube in Road Service, WestAlbany to Rotterdam Jet. templet was fitted over the side of the boiler, as shown inFig. 6, when the boiler was cold. It was firmly clamped atits center to the boiler. The fit was very carefully made, aman working nearly a week to have it absolutely engine was then fired up and the effect of heating up theboiler to the point where 200 lb. of steam was obtained causedthe wrapper sheet to bulge out so that there was 3/32 between the templet and the wrapper sheet at bothends of the templet. This, it seems, explained the cause ofthese staybolts breaking. In order to determine whether this distortion of the boiler was caused by the pressure or theheat, the templet was carefully refitted and a pressure of 225lb. of cold water put on the boiler. The templet retained itsseat, which proved conclusively that the distortion was dueto the temperature and not to the pressure. The applicationof three rows of flexible staybolts with 1/32 in., 1/16 Fig. 10—Curve Showing Movement of Tube in Road Service, Uticato Palatine Bridge and 1/32 in. slack, respectively, stopped the trouble andcured the trouble from leaky seams. The New York Central has also made experiments to de-termine why the back and front tube sheets become deflectedor distorted. It was believed that while the boiler was work-ing and had a hot fire the circulation of the water being goodthe expansion in the boiler proper, that is between the tubesheets, was greater than in the tubes. An experimental setof tubes was installed in a large Pacific type locomotive, eachtube being given a drop of 1 5/16 in. at the center before it
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
