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 50
... angle DIE , at the intersection of tangents , is equal to the central angle BC E , included between radii to the tan- gent points . 4. If a chord BE connect the tangent points , the angles IBE , IEB , are equal : each of them is equal ...
... angle DIE , at the intersection of tangents , is equal to the central angle BC E , included between radii to the tan- gent points . 4. If a chord BE connect the tangent points , the angles IBE , IEB , are equal : each of them is equal ...
Página 51
... angle of two degrees at the centre . Such an arc is called a two - degree curve . If one - third of the primary ... central angle per 100 feet chord , varies . XVIII . TO FIND THE RADIUS , THE APEX DISTANCE CIRCULAR CURVES ON RAILROADS . 51.
... angle of two degrees at the centre . Such an arc is called a two - degree curve . If one - third of the primary ... central angle per 100 feet chord , varies . XVIII . TO FIND THE RADIUS , THE APEX DISTANCE CIRCULAR CURVES ON RAILROADS . 51.
Página 59
... Angle HAN = 1 HGB ; HGB - AGB , ... HAN = AGB . HN = AN X tan . HAN ; i.e. , M = being the central angle subtended by the chord . CX tan . D ; D Example . D = 7 ° , C = = 100 ; to find M , the middle ordinate . MCX tan . D = 50 ...
... Angle HAN = 1 HGB ; HGB - AGB , ... HAN = AGB . HN = AN X tan . HAN ; i.e. , M = being the central angle subtended by the chord . CX tan . D ; D Example . D = 7 ° , C = = 100 ; to find M , the middle ordinate . MCX tan . D = 50 ...
Página 64
... angle , corresponding to an angle of 5o 10 ' : the de- flection angle , therefore , is 10 ° 20 ' . The tangential ... central angle by the degree of curvature . The central angle , 34 ° 27 ' , is equivalent to 2067 minutes ; dividing by ...
... angle , corresponding to an angle of 5o 10 ' : the de- flection angle , therefore , is 10 ° 20 ' . The tangential ... central angle by the degree of curvature . The central angle , 34 ° 27 ' , is equivalent to 2067 minutes ; dividing by ...
Página 71
... central angle due to the 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 ...
... central angle due to the 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 ...
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