A Practical Treatise On Railway Curves And Location for Young Engineers
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In our eReader you can find the full English version of the book. Read A Practical Treatise On Railway Curves And Location for Young Engineers Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Practical Treatise On Railway Curves And Location for Young Engineers
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To quickly assess the difficulty of the text, read a short excerpt:
31, = A. Move up, and sight back to sta. 28. The index now reads 20. Multiplying by 2, and subtracting the last tangent, we have the reading of the tangent at h = 26 : we have turned 26 of the curve. Continue as before. After putting in sta. 33, to find the deflexion which shall fix the P. T. , 33 + 30, say, as 100 feet : 30 feet : : 2 : the re- quired deflexion, = 36'. We may here remark the great convenience of an instrument graduated to hundredths of* a degree instead of sixtieths. In the pr...esent example it would be seen immediately that the tangential angle for 100 feet being 2, for 1 foot it would be 2 hundredths of a degree, and for 30 feet it would be 60 hundredths.
Well ! when the P. T. , = 33 + 30, is fixed, the index reads 30 36'. Move up, see that the vernier has not been disturbed, and sight back to sta. 31. Now twice the index reading, minus the last tangent, = 61 12' 26, = 35 12^ the present tangent, which is the final tangent, which finishes the curve.
The advantage of this manner of running a curve is that the instrument shows at a glance the work done, and there- fore errors may be detected with greater facility.
What to read after A Practical Treatise On Railway Curves And Location for Young Engineers?
You can find similar books in the "Read Also" column, or choose other free books by William Findlay Shunk to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
31, = A. Move up, and sight back to sta. 28. The index now reads 20. Multiplying by 2, and subtracting the last tangent, we have the reading of the tangent at h = 26 : we have turned 26 of the curve. Continue as before. After putting in sta. 33, to find the deflexion which shall fix the P. T. , 33 + 30, say, as 100 feet : 30 feet : : 2 : the re- quired deflexion, = 36'. We may here remark the great convenience of an instrument graduated to hundredths of* a degree instead of sixtieths. In the pr...esent example it would be seen immediately that the tangential angle for 100 feet being 2, for 1 foot it would be 2 hundredths of a degree, and for 30 feet it would be 60 hundredths.
Well ! when the P. T. , = 33 + 30, is fixed, the index reads 30 36'. Move up, see that the vernier has not been disturbed, and sight back to sta. 31. Now twice the index reading, minus the last tangent, = 61 12' 26, = 35 12^ the present tangent, which is the final tangent, which finishes the curve.
The advantage of this manner of running a curve is that the instrument shows at a glance the work done, and there- fore errors may be detected with greater facility.
What to read after A Practical Treatise On Railway Curves And Location for Young Engineers?
You can find similar books in the "Read Also" column, or choose other free books by William Findlay Shunk to read onlineMoreLess
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