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 115
... curves of contrary flexure ; and in every case it is worth the small additional outlay to make such a location . XXXIX . TO CONNECT TWO PARALLEL TANGENTS BY A REVERSED CURVE HAVING EQUAL RADII . 1. The radius R , and the perpendicular ...
... curves of contrary flexure ; and in every case it is worth the small additional outlay to make such a location . XXXIX . TO CONNECT TWO PARALLEL TANGENTS BY A REVERSED CURVE HAVING EQUAL RADII . 1. The radius R , and the perpendicular ...
Página 117
... REVERSED CURVE HAVING UNEQUAL RADII . K C 1. Given the perpendicular distance , D , between two paral lel tangents , and the unequal radii , R and r , of a reversed curve , to find the central angles , A , the chords , and the = Cos . A ...
... REVERSED CURVE HAVING UNEQUAL RADII . K C 1. Given the perpendicular distance , D , between two paral lel tangents , and the unequal radii , R and r , of a reversed curve , to find the central angles , A , the chords , and the = Cos . A ...
Página 119
... to find theradius of a reversed curve to close the angles . AIR X tan . A ; BI = RX tan . B. .. AB = RX ( tan . A + tan . Į B ) . Example . A = 16 ° , B = 10 • R = AB : ( tan . * A + tạn . } B ) . REVERSED CURVE WITH UNEQUAL ANGLES . 119.
... to find theradius of a reversed curve to close the angles . AIR X tan . A ; BI = RX tan . B. .. AB = RX ( tan . A + tan . Į B ) . Example . A = 16 ° , B = 10 • R = AB : ( tan . * A + tạn . } B ) . REVERSED CURVE WITH UNEQUAL ANGLES . 119.
Página 120
... curve which shall connect three tangents . · log . -1.357992 · · 3.566287 XLII . A REVERSED CURVE BETWEEN FIXED POINTS . Given the angles N and K , and the length of the straight line E F connecting two divergent tangents , to find the ...
... curve which shall connect three tangents . · log . -1.357992 · · 3.566287 XLII . A REVERSED CURVE BETWEEN FIXED POINTS . Given the angles N and K , and the length of the straight line E F connecting two divergent tangents , to find the ...
Página 121
... CD . Then EH EFX sin . I. But EH : X sin . B. EGGH ; EG = RX sin . A ; and GH = R .. EFX sin . I = RX ( sin . A + sin . B ) . EF = 1,400 , N = 30 ° , K .. REFX sin . I ÷ ( sin . A + sin . B ) . REVERSED CURVE BETWEEN FIXED POINTS . 121.
... CD . Then EH EFX sin . I. But EH : X sin . B. EGGH ; EG = RX sin . A ; and GH = R .. EFX sin . I = RX ( sin . A + sin . B ) . EF = 1,400 , N = 30 ° , K .. REFX sin . I ÷ ( sin . A + sin . B ) . REVERSED CURVE BETWEEN FIXED POINTS . 121.
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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