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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 78

An illustration from 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, leaf 78
ure F C arid FA, the distances to the curve. Then, by Gcometrv, FG =yFCx FA. This length being measured from F, will give the point G. WhenFG exceeds the length of the chain, the direction in which to measureit, so that it will just touch the curve, may be found by one or two trials. 8\. Problem.… … >Jolution. Assume the longer radius of any length ivhich mat/ be thought 60 CIRCULAR CURVES. proper, and find (§ 9) the corresponding deflection angle D^. Supposethat each of the curves A D and B D is 100 feet long. Then drawingCO, we have, in the triangle FOE,OE:FE = sm.OFE: sin. FOE.But the…

Railroad engineering · Ferrovias

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