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 |
Dentro del libro
Resultados 1-5 de 27
Página 50
... deflection angle : it is equal to the central angle , or to twice the tangential angle , subtended by either chord . 9. If F K be made equal to FH , and HN be made equal to HL , HK is called the tangential distance , and LN the deflec ...
... deflection angle : it is equal to the central angle , or to twice the tangential angle , subtended by either chord . 9. If F K be made equal to FH , and HN be made equal to HL , HK is called the tangential distance , and LN the deflec ...
Página 52
... deflection angle to a 2. By XVI . 3 and 4 , angle D AB = DBA = AGD = DGB = } I. 3. GIVEN THE INTERSECTION ANGLE I AND RADIUS R , TO FIND THE APEX DIST . A D. AD RX tan . I. = R = 1,910.1 , I = 35 ° 24 ' . Example . Then ADR tan . I ...
... deflection angle to a 2. By XVI . 3 and 4 , angle D AB = DBA = AGD = DGB = } I. 3. GIVEN THE INTERSECTION ANGLE I AND RADIUS R , TO FIND THE APEX DIST . A D. AD RX tan . I. = R = 1,910.1 , I = 35 ° 24 ' . Example . Then ADR tan . I ...
Página 54
... DEFLECTION ANGLE D , WITH 100 - FEET CHORDS , TO DETERMINE THE LENGTH OF THE LONG CHORD C , THE MIDDLE ORD . O , THE EXTERNAL SECANT S , OR THE APEX DIST . A D. Take from the proper column in Table XVI . , the number corresponding to ...
... DEFLECTION ANGLE D , WITH 100 - FEET CHORDS , TO DETERMINE THE LENGTH OF THE LONG CHORD C , THE MIDDLE ORD . O , THE EXTERNAL SECANT S , OR THE APEX DIST . A D. Take from the proper column in Table XVI . , the number corresponding to ...
Página 55
... DEFLECTION ANGLE D , TO FIND THE LENGTH OF THE CURVE . Divide I by D : the quotient will be the number of chord lengths in the curve . If the degree of curvature is a whole number , the more con- minutes , if any , in I to decimals of ...
... DEFLECTION ANGLE D , TO FIND THE LENGTH OF THE CURVE . Divide I by D : the quotient will be the number of chord lengths in the curve . If the degree of curvature is a whole number , the more con- minutes , if any , in I to decimals of ...
Página 56
... DEFLECTION N B IF AN- GLE D , AND CHORD C , TO FIND RADIUS R. FB sin . ALB = BL ; i.e. , C ÷ sin . D = R . Example . Let C100 feet , D = 4 ° . Then R C ÷ sin . D = 50 ÷ = .03491432.7 . If the chords are 100 feet long , as is usual in ...
... DEFLECTION N B IF AN- GLE D , AND CHORD C , TO FIND RADIUS R. FB sin . ALB = BL ; i.e. , C ÷ sin . D = R . Example . Let C100 feet , D = 4 ° . Then R C ÷ sin . D = 50 ÷ = .03491432.7 . If the chords are 100 feet long , as is usual in ...
Otras ediciones - Ver todas
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