. Railroad construction. Theory and practice. A textbook for the use of students in colleges and technical schools . Fig. 149. r+igHR-ig)^ sin (ff sin ((fi-FY (116). Fig. 150. Problem, To find the dimensions of a connecting curve run-ning to the INSIDE of a curved main track; number 9 frog, 4° 30curve, d = 13, 9r=48i. §274. SWITCHES AND CROSSINGS. 311 Solution. Eq. 112. ff= 0=:^ (d-g)= i2 = ^ = = (222-d) = Eq. 116. B = i^= (R-y) = (*_i?) = 1373. log = log sin (*-i?) = Eq. 114. . =7.

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. Railroad construction. Theory and practice. A textbook for the use of students in colleges and technical schools . Fig. 149. r+igHR-ig)^ sin (ff sin ((fi-FY (116). Fig. 150. Problem, To find the dimensions of a connecting curve run-ning to the INSIDE of a curved main track; number 9 frog, 4° 30curve, d = 13, 9r=48i. §274. SWITCHES AND CROSSINGS. 311 Solution. Eq. 112. ff= 0=:^ (d-g)= i2 = ^ = = (222-d) = Eq. 116. B = i^= (R-y) = (*_i?) = 1373. log = log sin (*-i?) = Eq. 114. . = log 2n = log (d-g) = co-log (2R-d) = log tan ^4^ = = ,91866= =° 22 146° 44 286° 21 350° 22 53 /og(i2-i^) = log sin * = co-log sin (^-F) = (r + ^g) = . r = d = 0° 15 (r+i£^) = sin i(<fr -F), .. ir^= 2. 17 384 274, Crossover between 9 V ^- IV Q 1 \ X s / // Y ^N \ --d- i e^ S, D Oi Fig. 151. two parallel straight tracks. (SeeFig. 151.) The turnoutsare as usual. The cross-over track may be straight,as shown by the full lines,or it ma

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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1913