The Transition Curve Or Curve of Adjustment as Applied to the Alignment of Railroads by the Method of Rectangular Co-ordinates and by Deflection Angles (or Polar Coordinates)McGraw publishing Company, 1907 - 75 pàgines |
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The Transition Curve Or Curve of Adjustment as Applied to the Alignment of ... Norman Benjamin Kellogg Visualització completa - 1907 |
The Transition Curve Or Curve of Adjustment as Applied to the Alignment of ... Norman Benjamin Kellogg Visualització completa - 1907 |
The Transition Curve Or Curve of Adjustment as Applied to the Alignment of ... Norman Benjamin Kellogg,W. Nordling Previsualització no disponible - 2016 |
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2LNC 50 feet abscissa Alioth arc at radius arc B,A axis B₁ backsight celestial sphere centers Change of Curvature chords be fractional CIRCULAR ARCS compound circular curve compound curve computed cose cubic parabola curve of adjustment curve with radius deflection angles deflection from tangent Degree Change desired to introduce equation EXAMPLE formula formula 61 Gauge 4.7 ft Given Hence inverse functions laid large central angles last instrument point mean solar measured Meridian passage method middle point nearly OFFSET DISTANCE ordinates origin point of spiral Polaris r,+m r+r₁ r₁ radius of curvature rate of curvature RECTANGULAR CO-ORDINATES reduced to arc running towards G SECANT semi-tangent sign for running spiral arcs Subchord superelevation tables Tổng’nt transition curve triangle ASG trigonometry uniting a tangent whence whole number фа
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Pàgina 5 - The degrees in an arc of a circle which is equal to the radius in length = 57.295. The arc of 1 degree at radius = 1 is .01745 -K Hence the expression for any number of degrees in a given circular are is: Ao - r 0/7 45 +