. Railroad construction, theory and practice; a text-book for the use of students in colleges and technical schools . Fia. 183.—Action of Shifting Center. §399. ROLLING-STOCK. 431 in tension and when the wheels are forced to one side by therails the links are inclined and the front of the engine isdrawn inward by a force equal to the weight on the bolstertimes the tangent of the angle of inclination of the links. Thisassumes that all links are vertical when the truck is in thecenter. Frequently the opposite links are normally inclined toeach other, which somewhat complicates the above simple r
. Railroad construction, theory and practice; a text-book for the use of students in colleges and technical schools . Fia. 183.—Action of Shifting Center. §399. ROLLING-STOCK. 431 in tension and when the wheels are forced to one side by therails the links are inclined and the front of the engine isdrawn inward by a force equal to the weight on the bolstertimes the tangent of the angle of inclination of the links. Thisassumes that all links are vertical when the truck is in thecenter. Frequently the opposite links are normally inclined toeach other, which somewhat complicates the above simple relationof the forces, although the general principle remains identical. The two-wheeled pilot-truck with shifting center is illus-trated in Fig. 184. The figure shows the facihty with which. Fig. 184.—Two-wheeled Truck—Shifting Center.
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