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 11
Página 19
... called 1 , the natural sines and cosines will be used in the application of these formulas ; they are often more convenient than logarithms in railroad practice , especially when the numbers which measure the sides of the triangle are ...
... called 1 , the natural sines and cosines will be used in the application of these formulas ; they are often more convenient than logarithms in railroad practice , especially when the numbers which measure the sides of the triangle are ...
Página 50
... called a deflection angle : it is equal to the central angle , or to twice the tangential angle , subtended by either chord . 9. If F K be made equal to FH , and HN be made equal to HL , HK is called the tangential distance , and LN the ...
... called a deflection angle : it is equal to the central angle , or to twice the tangential angle , subtended by either chord . 9. If F K be made equal to FH , and HN be made equal to HL , HK is called the tangential distance , and LN the ...
Página 51
... called a two - degree curve . If one - third of the primary radius of 5,730 feet , or 1,910 feet , be used , the arc is called a three- degree curve ; and so on . 3. It should be borne in mind , however , that these measure- ments are ...
... called a two - degree curve . If one - third of the primary radius of 5,730 feet , or 1,910 feet , be used , the arc is called a three- degree curve ; and so on . 3. It should be borne in mind , however , that these measure- ments are ...
Página 52
... called C , Call the deflection angle to a 2. By XVI . 3 and 4 , angle E AB = EBA = AGE = EGB = 1 . = 3. GIVEN THE INTERSECTION ANGLE I AND RADIUS R , TO FIND THE TANGENT T. T = RX tan . I. R = 1,910.1 , I = 35 ° 24 !. Example . Then T ...
... called C , Call the deflection angle to a 2. By XVI . 3 and 4 , angle E AB = EBA = AGE = EGB = 1 . = 3. GIVEN THE INTERSECTION ANGLE I AND RADIUS R , TO FIND THE TANGENT T. T = RX tan . I. R = 1,910.1 , I = 35 ° 24 !. Example . Then T ...
Página 66
... called , or tangent lengths IB , IF . These are each equal to R × tan . I. If a 7 ° 30 ' curve be prescribed to Ø12 Or , referring to Ta- ble XVI . , close the angle , R × tan . I = 764 × 0.659 503 feet . = 66 TO TRACE A CURVE ON THE ...
... called , or tangent lengths IB , IF . These are each equal to R × tan . I. If a 7 ° 30 ' curve be prescribed to Ø12 Or , referring to Ta- ble XVI . , close the angle , R × tan . I = 764 × 0.659 503 feet . = 66 TO TRACE A CURVE ON 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