. American engineer and railroad journal . oof the older engines, and under ordinary conditions double hcad- their tapered faces in contact. The same plan is used for keyingthe frames to the cylinders and saddle. The saddle itself is ofcast steel and is composed of two sections. The lower sectionextends the full depth of the slab frames, and supports the hingepin, which is 7 inches in diameter. With this arrangement theseparate crosstie heretofore used to support the lower end ofthe hinge pin is combined with the saddle casting, and the cyl-inders, frames and saddle are bolted and keyed togeth
. American engineer and railroad journal . oof the older engines, and under ordinary conditions double hcad- their tapered faces in contact. The same plan is used for keyingthe frames to the cylinders and saddle. The saddle itself is ofcast steel and is composed of two sections. The lower sectionextends the full depth of the slab frames, and supports the hingepin, which is 7 inches in diameter. With this arrangement theseparate crosstie heretofore used to support the lower end ofthe hinge pin is combined with the saddle casting, and the cyl-inders, frames and saddle are bolted and keyed together to form,a strong and rigid structure. The low pressure cylinders arebolted directly to a steel box-casting which is secured to theframes in accordance with the customary practice of the to the Mallet freight locomotives mentioned abovethese locomotives are designed to run firebox end first, in orderto give the enginemen an unobstructed view of the track. Thetruck under the firebox, therefore, becomes the leading niwKKFrL niL i;i;i<xi.\r, locomotive. ing of pasenger trains will thus be avoided in the future. Ingeneral the design of the new locomotives follows that of theMallet freight locomotives with 2-8-8-2 wheel arrangement,which have been in successful use on this division since 1909.*A number of modifications have been introduced, however, andthese include some features which are new to the practice ofthe builders. Separate type boilers as usually applied by the builders tolocomotives of this capacity have been specified. In the presentinstance, however, the dome is placed a short distance aheadof the firebox, and an internal dry pipe conveys the steam to theintermediate combustion chamber. This chamber contains rightand left hand steam pipes of ordinary construction, and thesecommunicate with short outside horizontal pipes, which lead tothe top of the high pressure steam chests. The high pressureexhaust is conveyed to the smoke-box
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
