. Railroad construction. Theory and practice. A textbook for the use of students in colleges and technical schools . (r-i^) = versi^ ■ (107)FR = (r- FiG. 146. ■ig)smF. (108) If it is considered that the distance FR consumes too muchtrack room it may be shortened the method indicated inFig. 151. 272. Connecting curve from a curved track to the the main track is curved, the required quantities are the. radius r of the connecting curve from F to S, Fig. 147, and itslength or central angle. In the triangle CSF CS + CF:CS-CF::tsin i(CFS-\rCSF):tm HCFS-CSF); n § 273. SWITCHES AND CR

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. Railroad construction. Theory and practice. A textbook for the use of students in colleges and technical schools . (r-i^) = versi^ ■ (107)FR = (r- FiG. 146. ■ig)smF. (108) If it is considered that the distance FR consumes too muchtrack room it may be shortened the method indicated inFig. 151. 272. Connecting curve from a curved track to the the main track is curved, the required quantities are the. radius r of the connecting curve from F to S, Fig. 147, and itslength or central angle. In the triangle CSF CS + CF:CS-CF::tsin i(CFS-\rCSF):tm HCFS-CSF); n § 273. SWITCHES AND CROSSINGS. 309 but i(CFS + CSF) =90-i(p; and, since the triangle 0^SF iaisosceles, i(CFS -CSF) = ^F; .-. 2R + d:d-g::cot i^:tan ^F::cot JF:tan i<p; ••• *-i^=-S3^ <io«) From the triangle COiF we may derive r — ig:R-\-ig::sin ^:sin (i^+^); ^-^^ = ^^ + i^)ih^W^- . o . . (110) Also i^6^=2()sinKi^ + ^) (Ill) 273. Connecting curve from a curved track to the INSIDE.

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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1913