. American engineer and railroad journal . making the buffing oppose the lading moment,be lost. The use of top cover plates will preserve the axis nearerto the upper surface. The bow is helpful in that it permits thespacing of the cantilevers and end sill almost at will with thesupporting truck center. This advantage is of much value inthe design as it means the elimination of the greatest of thenumerous limitations governing superstructure arrangement. The most economical design of this underframe demands theomission of the central cantilevers and hence the concentratedload coming upon the ce
. American engineer and railroad journal . making the buffing oppose the lading moment,be lost. The use of top cover plates will preserve the axis nearerto the upper surface. The bow is helpful in that it permits thespacing of the cantilevers and end sill almost at will with thesupporting truck center. This advantage is of much value inthe design as it means the elimination of the greatest of thenumerous limitations governing superstructure arrangement. The most economical design of this underframe demands theomission of the central cantilevers and hence the concentratedload coming upon the center sills, as at P* in the former case,will not be found in this case. The table, as altered to suitthese conditions, which will apply to an underframe of the typeshown in Figs. 6, 7 and 8, is shown in Fig. 9. In substituting values of Pn it must be remembered that inremoving P, the value of P3 is increased by the value of d cov-ering what is now 2d -f- e. (See Fig. 11, page 13.) The value of w here noted is the uniform side load equiva-. iemaa! ^:»ai i\ s Ml 1 1 •-*•>» ?.^^ vwr*:«££:v,?f^ •I I 1. *1 *\ f
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
