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 36
... chord AC and the curve in this instance , which ordinates therefore will be equal to the middle ordinate FD multiplied by 0.89 and 0.55 respectively . Adding these multiples to the grade elevation at A , the elevations of the ...
... chord AC and the curve in this instance , which ordinates therefore will be equal to the middle ordinate FD multiplied by 0.89 and 0.55 respectively . Adding these multiples to the grade elevation at A , the elevations of the ...
Página 37
... chord A C = CH ÷ 8 = 1.2 ÷ 80.15 per 50 feet . BE BD - CH : - .. FE 1.42 - Ordinates at 990.7 × 0.44 - = 2 0.6 - - 1.4 . - = 0.7 . 0.31 . = 0.52 . 0.66 . - = 0.70 . Ordinates at 660.7 × 0.75 Ordinates at 3 · 3 = 0.7 × 0.94 Mid ...
... chord A C = CH ÷ 8 = 1.2 ÷ 80.15 per 50 feet . BE BD - CH : - .. FE 1.42 - Ordinates at 990.7 × 0.44 - = 2 0.6 - - 1.4 . - = 0.7 . 0.31 . = 0.52 . 0.66 . - = 0.70 . Ordinates at 660.7 × 0.75 Ordinates at 3 · 3 = 0.7 × 0.94 Mid ...
Página 38
... chord A C = CH ÷ 8 = 0.25 per 50 feet . BE = BD — } C H = 1 foot . .. FE = 1 ÷÷ 2 = 0.5 . Ordinates 9 9 = 0.5 X 0.44 -- = 0.22 . 60.5 X 0.75 = 0.37 . Ordinates 6 Ordinates 3 3 - = 0.5 X 0.94 0.47 . - = 0.50 . Mid.ordinate = The ...
... chord A C = CH ÷ 8 = 0.25 per 50 feet . BE = BD — } C H = 1 foot . .. FE = 1 ÷÷ 2 = 0.5 . Ordinates 9 9 = 0.5 X 0.44 -- = 0.22 . 60.5 X 0.75 = 0.37 . Ordinates 6 Ordinates 3 3 - = 0.5 X 0.94 0.47 . - = 0.50 . Mid.ordinate = The ...
Página 39
... chord AC = CH ÷ 6 = 0.25 . EB DB - DE = 1,5 — 0.75 = 0.75 = ... FE = 0.75 ÷ 2 = 0.375 Ordinates S - 8 0.375 X 55 0.21 = Ordinates 4 — 4 = 0.375 × 89 = 0.33 - Mid ordinate = = 0.37 The elevations then along the chord A C , descending at ...
... chord AC = CH ÷ 6 = 0.25 . EB DB - DE = 1,5 — 0.75 = 0.75 = ... FE = 0.75 ÷ 2 = 0.375 Ordinates S - 8 0.375 X 55 0.21 = Ordinates 4 — 4 = 0.375 × 89 = 0.33 - Mid ordinate = = 0.37 The elevations then along the chord A C , descending at ...
Página 50
... chord BE . 6. Acute angles at the circumference , subtended by equal chords , are equal . 7. An acute angle , KF H , between a tangent and a chord , is called a tangential angle , and is equal to the peripheral angle LFH subtended by an ...
... chord BE . 6. Acute angles at the circumference , subtended by equal chords , are equal . 7. An acute angle , KF H , between a tangent and a chord , is called a tangential angle , and is equal to the peripheral angle LFH subtended by an ...
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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