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 14
... remainder by the corresponding tabular difference . The quotient will be seconds , which must be added to the degrees and minutes set aside , in the case of a sine or tangent , and subtracted in the case of a cosine or cotangent ...
... remainder by the corresponding tabular difference . The quotient will be seconds , which must be added to the degrees and minutes set aside , in the case of a sine or tangent , and subtracted in the case of a cosine or cotangent ...
Página 17
... remainder will be the sum of the other two angles . Then , by proposition 3 , - As the sum of the given sides is to their difference , So is the tangent of half the sum of the remaining angles to the tangent of half their difference ...
... remainder will be the sum of the other two angles . Then , by proposition 3 , - As the sum of the given sides is to their difference , So is the tangent of half the sum of the remaining angles to the tangent of half their difference ...
Página 69
... remainder will be the required index angle . Thus the index angle which established stake 9 was 33 ° 45 ' . Double this angle will be 67 ° 30 ' ; subtracting 18 ° 45 ' , the reading in tangent at the last turning - point , we have 48 ...
... remainder will be the required index angle . Thus the index angle which established stake 9 was 33 ° 45 ' . Double this angle will be 67 ° 30 ' ; subtracting 18 ° 45 ' , the reading in tangent at the last turning - point , we have 48 ...
Página 99
... remainder is the natural cosine of the angle of re- treat along the located curve to the required P. C. C. Example . 3. A 3 ° curve on the ground , to find the P. C. C. of a 5 ° curve striking 27 feet to the right . Here D = 27 ; R 1 ...
... remainder is the natural cosine of the angle of re- treat along the located curve to the required P. C. C. Example . 3. A 3 ° curve on the ground , to find the P. C. C. of a 5 ° curve striking 27 feet to the right . Here D = 27 ; R 1 ...
Página 128
... remainder is the angle y = 4 ° 18 ' . Finally , IC 86 = Multiplied by sin . x , 48 ° 11 ' = CD And C D divided by sin . y , 4 ° 18 ' COR say , 855 feet • log . 1.934498 • • • log . 9.872321 · • log . 1.806819 • • · log . 8.874938 log ...
... remainder is the angle y = 4 ° 18 ' . Finally , IC 86 = Multiplied by sin . x , 48 ° 11 ' = CD And C D divided by sin . y , 4 ° 18 ' COR say , 855 feet • log . 1.934498 • • • log . 9.872321 · • log . 1.806819 • • · log . 8.874938 log ...
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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