Field-book for railroad engineers. Containing formulas for laying out curves, determining frog angles, levelling, calculating earth-work, etc., etc., together with tables of radii, ordinates deflections, long chords, magnetic variation, logarithms, logarithmic and natural sines, tangents, etc., etc (1877)
Henck, John Benjamin, 1816-1903 · New York : D. Appleton · leaf 70
pendicular to each other,a and b may be found from these lines. For a = C H -\- DH ^ (75+JE;77cot. iZ(Tab. X. 9). and6 =^DE = ^^i- MISCELLANEOUS PROBLEMS. 5i Example. Given I = 20° 16, a = 600, and 6 = 80, to find x andH. Here c = 600 cos. 10° 8 = 59064, 2 c - 6 = 1101.28, and x =ySO X 110^28 =… … Fig. 25 Solution. Measure or calculate the perpendicular CD. Then if CZ)be produced to the centre 0, the right triangles AD C and CA 0,having th3 jungle at G common, are similar, and give CD : A D =AC: A 0, or ^^A^XACCD If it is inconvenient to measure the chord A B, a line E F, parallelto it, may…
Railroad engineering · Ferrovias
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