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 39
ngles HAB = A and ABL = B,tnd the first radius A E = R, to find the second radius B F = R of aTeversfd curve to unite the tangents H A and B K. First Solution. With the given radius run the carve to the point Z),ohere the tangent D N becomes parallel to B K. The point D is found 20 CIRCULAR CURVES.… … Setting the instrument at Z), run the curve to the reversing point C in theline from D to B {^ 32), and measure D C and C B. Then the similartriangles DEC and BFC give DC:DE =^ CB : B F, or D C: Ji^ CB:R; CB .R^. DC X R- Second Solution. By this method the second radius may bt founuby calculation…
Railroad engineering · Ferrovias
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