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The Transition Curve Or Curve of Adjustment as Applied to the Alignment of ...
Norman Benjamin Kellogg,W. Nordling
No preview available - 2016
abscissa Alioth arc at radius arc B,A axis backsight become tangent celestial sphere centers centrifugal force chords be fractional CIRCULAR ARCS compound circular curve compound curve computed corresponding cose cubic parabola curve of adjustment Curve Radius Reciprocal curve with radius deflection angles deflection from tangent degrees and minutes denote desired to introduce determine distance D,D equation Example expressed in arc formula 61 intersection angle inverse functions large central angles last instrument point length of spiral mean solar means of transition method middle point nearly Nordling number of chords ordinates origin outer rail perpendicular point of spiral Polaris Prob radius of curvature rate of curvature RECTANGULAR CO-ORDINATES reduced to arc running towards G semi-tangent adjacent sign for running spiral arcs superelevation tables third circular curve trigonometry uniting a tangent vertical curve whence whole number