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 x
... distance : i.e. , the distance from the P. I. to the point where a curve merges in the tangent . P. C. Point of curve : the stake - mark at the beginning of a curve . P. T. Point of tangent : the stake - mark at the end of a curve ...
... distance : i.e. , the distance from the P. I. to the point where a curve merges in the tangent . P. C. Point of curve : the stake - mark at the beginning of a curve . P. T. Point of tangent : the stake - mark at the end of a curve ...
Página 11
... distance from one extremity of the arc enclosing it , to the diameter , through the other extrem- ity . Thus PM is the sine of the angle M O A. = The cosine of an angle is the sine of the complement of the angle . Thus N M OP is the ...
... distance from one extremity of the arc enclosing it , to the diameter , through the other extrem- ity . Thus PM is the sine of the angle M O A. = The cosine of an angle is the sine of the complement of the angle . Thus N M OP is the ...
Página 28
... distance of several hundred feet ; the leveller is thus enabled to take intermediate elevations rapidly , and , when ... distance . Calling the required correction A , for any given distance D , then A = .000215 × D2 if D is in ...
... distance of several hundred feet ; the leveller is thus enabled to take intermediate elevations rapidly , and , when ... distance . Calling the required correction A , for any given distance D , then A = .000215 × D2 if D is in ...
Página 29
... distances at sea . The Peak of Teneriffe , for example , 16,000 feet high , should be just visible from the sea - level at a distance = √16000 ÷ 0.6 = say 163 miles . 10. TO FIND DIFFERENCES IN ELEVATION BY MEANS OF THE BAROMETER ...
... distances at sea . The Peak of Teneriffe , for example , 16,000 feet high , should be just visible from the sea - level at a distance = √16000 ÷ 0.6 = say 163 miles . 10. TO FIND DIFFERENCES IN ELEVATION BY MEANS OF THE BAROMETER ...
Página 30
... distance from the centre line being obviously made up of half the width of road - bed added to the horizontal distance due from the slope , to the depth of cut or height of fill . Thus , with 20 feet road - bed , 9 feet cut , and slope ...
... distance from the centre line being obviously made up of half the width of road - bed added to the horizontal distance due from the slope , to the depth of cut or height of fill . Thus , with 20 feet road - bed , 9 feet cut , and slope ...
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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