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 43
A C to Z>, where its tangent OD becomesparallel to B K, and consequently the radius DE parallel to B F.Then if the chords CD and CB be drawn, we have the angle CED= CFB; whence E CD, the half-supplement of CE D, is equal toFCB, the half-supplement of CFB. But E CD cannot be equal toF CB, unless… … !S)lution. Let AI and Bl (fig. 11) be the tangents of the curve.Through the intersection point 7, draw IM bisecting the angle A IB.Draw A L and B M perpendicular respectively to A I and B /, niect-ing 1M in L and M. Then the radius of the branch commencing onthe shorter tangent A /must be less than…
Railroad engineering · Ferrovias
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