The Field Engineer: A Handy Book of Practice in the Survey, Location, and Trackwork of Railroads; Containing ... Rules and Tables ... Applicable to ... the Standard and the Narrow Gauge ...D. van Nostrand, 1880 - 318 páginas |
Dentro del libro
Resultados 6-10 de 26
Página 32
... gives him a point in the air , 10 15.5 = 25.5 feet out from the centre stake , level with the instrument , as the limit of the imaginary section ; and from that point he can pretty well judge where a line corresponding to the formation ...
... gives him a point in the air , 10 15.5 = 25.5 feet out from the centre stake , level with the instrument , as the limit of the imaginary section ; and from that point he can pretty well judge where a line corresponding to the formation ...
Página 45
... gives a fair approximation at any time of year . 12. By observation of the North Star in meridian . Find the time of passage in Table I. Choosing still weather , hang a plumb - bob from some high place into a bucket of water , and ...
... gives a fair approximation at any time of year . 12. By observation of the North Star in meridian . Find the time of passage in Table I. Choosing still weather , hang a plumb - bob from some high place into a bucket of water , and ...
Página 53
... gives 609.6 , the tangent sought . 6. GIVEN THE INTERSECTION ANGLE I AND TANGENT T , TO FIND RADIUS R. Transposing the equation in ( 3 ) , RT tan . I = = TX cot . I. Example . T = 609.6 , I = 35 ° 24 ′ R = T cot . I = 609.6 × 3.1334 ...
... gives 609.6 , the tangent sought . 6. GIVEN THE INTERSECTION ANGLE I AND TANGENT T , TO FIND RADIUS R. Transposing the equation in ( 3 ) , RT tan . I = = TX cot . I. Example . T = 609.6 , I = 35 ° 24 ′ R = T cot . I = 609.6 × 3.1334 ...
Página 54
... gives 3 for the degree of curvature , and 5,730 divided by 3 makes the radius R = 1,910 feet . 10. GIVEN THE INTERSECTION ANGLE I AND THE DEGREE OF CURVATURE OR DEFLECTION ANGLE D , WITH 100 - FEET CHORDS , TO DETERMINE THE LENGTH OF ...
... gives 3 for the degree of curvature , and 5,730 divided by 3 makes the radius R = 1,910 feet . 10. GIVEN THE INTERSECTION ANGLE I AND THE DEGREE OF CURVATURE OR DEFLECTION ANGLE D , WITH 100 - FEET CHORDS , TO DETERMINE THE LENGTH OF ...
Página 60
... gives 1.098 , the required ordinate . 6. A quick way of laying off ordinates on the ground , and one sufficiently exact for the field , is , after fixing the point II by means of the middle ordinate HN , to stretch a line from H to A ...
... gives 1.098 , the required ordinate . 6. A quick way of laying off ordinates on the ground , and one sufficiently exact for the field , is , after fixing the point II by means of the middle ordinate HN , to stretch a line from H to A ...
Otras ediciones - Ver todas
The Field Engineer: A Handy Book of Practice in the Survey, Location and ... William F. Shunk Sin vista previa disponible - 2008 |
The Field Engineer: A Handy Book of Practice in the Survey, Location, and ... William Findlay Shunk Sin vista previa disponible - 2017 |
Términos y frases comunes
100 feet long 100-feet chords adjustment apex distance called central angle column Cosine 1 Sine Cotang cross-hair Cube Roots decimals deflection distance degree of curvature DEGREE OF CURVE Diff divided elevation engineer equal Example feet figure fixed foregoing frog angle Full Gauge gauge of track gauge side gent ground index angle instrument intersection angle length of switch-rail located logarithm M.
M. I Sine Main frog dist mantissa mark measure method middle frog middle ordinate middle point minutes Multiply observation outer rail parallel perpendicular quotient radii radius range Reciprocals REVERSED CURVE right triangle screws slope Square Roots standard gauge straight line sub-chord subtended Subtract Suppose Table XVI tabular tance Tang tangent A B tangential angle tangential distance telescope terminal tangent tion toe of switch Trigonometry turnout curve vernier versin vertical ΙΟ ΤΑΝ
Pasajes populares
Página 18 - ... the square of the hypothenuse is equal to the sum of the squares of the other two sides.
Página 4 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Página 11 - ... is supposed to be divided into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds. Degrees, minutes, and seconds, are designated respectively, by the characters ° ' ". For example, ten degrees, eighteen minutes, and fourteen seconds, would be written 10° 18
Página 4 - The logarithm of the product of two numbers is equal to the sum of the logarithms of the numbers. log» MN = log» M + log