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 54
int of the frog. Fig. 16 … Solution. Let the arc FB be the inner rail of the second branch,FG = R — ^g its radius, and B the tangent point where the turnoutbecomes parallel to the main track. Now since the tangent FK is oneside of the frog produced, the angle HFK= F, and since the angleof intersection at iTis also equal io…
Railroad engineering · Ferrovias
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