A Practical Treatise on Railway Curves and Location: For Young Engineers ...H.C. Baird & Company, 1890 - 100 páginas |
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A Practical Treatise on Railway Curves and Location, for Young Engineers... William Findlay Shunk Visualização completa - 1869 |
A Practical Treatise on Railway Curves and Location: For Young Engineers William Findlay Shunk Prévia não disponível - 2016 |
A Practical Treatise on Railway Curves and Location: For Young Engineers William Findlay Shunk Prévia não disponível - 2012 |
Termos e frases comuns
100 feet Chord 30 feet angle dee Angle in Degrees Angle of Radius apart.-Chord 100 feet ARTICLE centre chord being 100 cosin cubic deflect Deflex'n deflexion angle deflexion distance degree of curvature Degrees and Minutes dist distance back dividing equal to half Example.-Let EXCAVATION AND EMBANKMENT feet apart.-Chord 100 find the deflexion find the point gential GIVEN RADIUS grade half the angle half the breadth half the deflexion index reads Lengths of Ordinates middle ordinate minutes to hundredths Multiplying offset curve Ordinates 10 feet Ordinates in feet parallel curve Place the transit point f radii Radius Def radius in feet Reducing minutes REQUIRED TO FIND reverse curve right angle roadway ROOTS OF NUMBERS.-CONTINUED screws second curve side slopes sight back Square Roots SQUARES AND SQUARE Suppose TABLE OF ORDINATES.-CONTINUED tance tang tangent df tangential angle tangential distance telescope TERMINATE turn into tangent vernier
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Página 40 - From the square of the radius, subtract the square of half the chord; and take the square root of the remainder from the radius, for the middle ordinate.
Página 7 - It is found that the circle described with radius of 5730 feet has a circumference of 36,000 feet. Since there are 360° in the circle, the central angle subtended by a chord of 100 feet is, in this case, equal to 1°, and the curve is named a one degree curve. So likewise in a circle with radius of 2865 feet, half of 5730, the central angle corresponding to the chord 100 is 2° ; the curve is then called a two degree curve. The beginning of a curve is called the point of curvature, or simply the...
Página 43 - To find the deflexion distance with chord of 100 feet and any radius. — Divide the constant number 10000 by the radius in feet ; the quotient will be the deflexion distance : — for the deflexion distance with a radius of 10000 feet is 1 foot, and the deflexion distances for other radii increase inversely as the radii. Example. — What is the deflexion distance for a 5° curve, the chord being 100 feet ? Here ^^ = 8-72 feet, the deflexion distance. To find the deflexion distance with any given...