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 66
... point of tangent F may be established . 10. Next , set off UE = FV = 2.18 feet , and lay out FK in prolongation of the range U F ; FK will be in the line of the terminal tangent . 11. This analysis has been somewhat minute and detailed ...
... point of tangent F may be established . 10. Next , set off UE = FV = 2.18 feet , and lay out FK in prolongation of the range U F ; FK will be in the line of the terminal tangent . 11. This analysis has been somewhat minute and detailed ...
Página 67
... terminal tangent , measure I F , = 503 feet , and set the P. T. at F. Then direct the telescope to the last point fixed on the ini- tial range AB , meas- ure I B , = 503 feet , and set the P. C. at B. Move to B. 4. Suppose the P. C. to ...
... terminal tangent , measure I F , = 503 feet , and set the P. T. at F. Then direct the telescope to the last point fixed on the ini- tial range AB , meas- ure I B , = 503 feet , and set the P. C. at B. Move to B. 4. Suppose the P. C. to ...
Página 68
... terminal plus . 6. Next , to determine the proper deflections from the line of tangent at B , bear in mind that the deflection for a whole chain is half the degree of curvature ; and that , in field - curves of more than 300 feet radius ...
... terminal plus . 6. Next , to determine the proper deflections from the line of tangent at B , bear in mind that the deflection for a whole chain is half the degree of curvature ; and that , in field - curves of more than 300 feet radius ...
Página 94
... tangent at D , and the curve may thence be traced in both directions . 2. SECOND METHOD . - Having , as in the first ... terminal tangent , and fix E on the opposite shore . Fix also E D , and note the angle EBD . Move to The tri- E ...
... tangent at D , and the curve may thence be traced in both directions . 2. SECOND METHOD . - Having , as in the first ... terminal tangent , and fix E on the opposite shore . Fix also E D , and note the angle EBD . Move to The tri- E ...
Página 96
... tangent be moved forward , like the blade of a skate , until the terminal tangent merges in D F , the P. T. will have traversed the line BD , equal and parallel to AC . If , there- fore , on the ground at B , the angle E B D , equal to ...
... tangent be moved forward , like the blade of a skate , until the terminal tangent merges in D F , the P. T. will have traversed the line BD , equal and parallel to AC . If , there- fore , on the ground at B , the angle E B D , equal to ...
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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