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 |
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Página 68
... length of the curve . Or , the intersection angle 66 ° 45 ' is equivalent to 4005 ' , and the degree of curvature 7 ° 30 ' is equivalent to 450 ' : dividing the former by the latter , we have 890 feet for the length of the curve , as ...
... length of the curve . Or , the intersection angle 66 ° 45 ' is equivalent to 4005 ' , and the degree of curvature 7 ° 30 ' is equivalent to 450 ' : dividing the former by the latter , we have 890 feet for the length of the curve , as ...
Página 69
... length of the sub - chord in feet , gives a product of 300 , three - tenths of which amount to 90 minutes = 1o 30 ' . Adding 1 ° 30 ′ to 56 ° 15 ' , makes the index angle 57 ° 45 ' to fix the P. T. at 11.40 . = 48 ° 45 ' , = 15. Move to ...
... length of the sub - chord in feet , gives a product of 300 , three - tenths of which amount to 90 minutes = 1o 30 ' . Adding 1 ° 30 ′ to 56 ° 15 ' , makes the index angle 57 ° 45 ' to fix the P. T. at 11.40 . = 48 ° 45 ' , = 15. Move to ...
Página 71
... length of curve to that point ; and at the P. T. that number must correspond with the total central angle . The work can thus be checked with facility during its progress , and checks itself at the end . 18. The young transitman is ...
... length of curve to that point ; and at the P. T. that number must correspond with the total central angle . The work can thus be checked with facility during its progress , and checks itself at the end . 18. The young transitman is ...
Página 72
... very carefully with the rod , or with a steel tape if they exceed in length the pocket rule which every engineer should have about him . XXIII . TURNING OBSTACLES TO MEASUREMENT IN TANGENT . 1. 72 TURNING OBSTACLES TO VISION IN TANGENT .
... very carefully with the rod , or with a steel tape if they exceed in length the pocket rule which every engineer should have about him . XXIII . TURNING OBSTACLES TO MEASUREMENT IN TANGENT . 1. 72 TURNING OBSTACLES TO VISION IN TANGENT .
Página 73
... length . Move the instru- ment to D , make the angle BDA = BDE , and mark the point of intersection A. By reason of symmetry in the triangles ADB , BDE , AB = BE , and may be measured on the ground . 2. Or , fix the point E , and lay ...
... length . Move the instru- ment to D , make the angle BDA = BDE , and mark the point of intersection A. By reason of symmetry in the triangles ADB , BDE , AB = BE , and may be measured on the ground . 2. Or , fix the point E , and lay ...
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