The Field Engineer: A Handy Book of Practice in the Survey, Location, and Track-work of Railroads; Containing a Large Collection of Rules and Tables, Original and Selected, Applicable to Both the Standard and the Narrow Gauge, and Prepared with Special Reference to the Wants of the Young EngineerD. Van Nostrand Company, 1890 - 339 páginas |
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Página 86
... located . Spread the dividers to 500 feet by the scale , start at the foot of the ascent , and step up , complying with the general trend of the ground , to the summit . This needful preliminary gives about the distance you have to work ...
... located . Spread the dividers to 500 feet by the scale , start at the foot of the ascent , and step up , complying with the general trend of the ground , to the summit . This needful preliminary gives about the distance you have to work ...
Página 96
... located , containing an angle of 44 ° 26 ' , and ending in tangent BE : required , that it shall end in tangent D F , parallel to BE . It is plain , from the diagram , that if the curve and its initial tangent be moved forward , like ...
... located , containing an angle of 44 ° 26 ' , and ending in tangent BE : required , that it shall end in tangent D F , parallel to BE . It is plain , from the diagram , that if the curve and its initial tangent be moved forward , like ...
Página 97
... LOCATED , ONE OF DIFFERENT RADIUS , BEGINNING AT THE SAME POINT , CONTAINING THE SAME ANGLE , AND ENDING IN A FIXED TERMINAL TANGENT . 1. Suppose the 4 ° curve AB , containing an angle of 32 ° 20 ' , to have been located , and that it ...
... LOCATED , ONE OF DIFFERENT RADIUS , BEGINNING AT THE SAME POINT , CONTAINING THE SAME ANGLE , AND ENDING IN A FIXED TERMINAL TANGENT . 1. Suppose the 4 ° curve AB , containing an angle of 32 ° 20 ' , to have been located , and that it ...
Página 98
... LOCATED A CURVE A B C , TO FIND THE POINT B AT WHICH TO COMPOUND INTO ANOTHER CURVE OF GIVEN RADIUS , WHICH SHALL END IN TANGENT E F , PARALLEL TO THE TERMINAL TANGENT OF THE ORIGINAL CURVE , AND A GIVEN DISTANCE FROM IT . H B = F C 1 ...
... LOCATED A CURVE A B C , TO FIND THE POINT B AT WHICH TO COMPOUND INTO ANOTHER CURVE OF GIVEN RADIUS , WHICH SHALL END IN TANGENT E F , PARALLEL TO THE TERMINAL TANGENT OF THE ORIGINAL CURVE , AND A GIVEN DISTANCE FROM IT . H B = F C 1 ...
Página 99
... located , and a terminal curve of larger radius required to be put in . 2. We have , then , the following general rule for such cases : Divide the perpendicular distance between terminal tangents by the difference of the radii , and ...
... located , and a terminal curve of larger radius required to be put in . 2. We have , then , the following general rule for such cases : Divide the perpendicular distance between terminal tangents by the difference of the radii , and ...
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Términos y frases comunes
A. D. MIN adjustment apex distance backsight called central angle CHORD column Cosine 1 Sine cross-hair Cube Roots decimal deflection distance degree of curvature degree of curve Diff divided engineer equal error Example feet figure fixed FOOD foregoing formation slope frog angle gauge of track gauge side ground Hence inches index angle instrument height intersection angle located logarithm Main frog dist mantissa mark measure method metres metric curve middle frog middle ordinate middle point minutes multiplied natural sine number corresponding observation opposite outer rail parallel perpendicular plane triangle Polaris quotient radii radius range REVERSED CURVE rule Sine 1 Cotang Square Roots sub-chord subtended Subtract Suppose switch-rail Table XVI tabular tance Tang tangential angle tangential distance telescope terminal tangent tion toe of switch transitman Trigonometry turnout curve vernier vertical ΙΟ