Second Report Addressed to the Directors and Proprietors of the London and Birmingham Railway Company, Founded on an Inspection Of, and Experiments Made Made on the Liverpool and Manchester RailwayB. Fellowes, 1835 - 116 Seiten |
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9 inches bearing bad joints bearing distance butt joints carriage central deflection centre rib chairs and pins cubic feet Deflection Deflection Deflection of joint deflectometer disturbance Ditto ditto Ditto middle length double Edward Cropper EDWARD WOODS element of deflection experiments feet 9 inches fibres former Report four lines given Grand Junction Rail Grand Junction Railway greater inch depth inclined plane Index joint blocks Joint ditto joint length length of bearing less lines per mile Liverpool and Manchester Liverpool Station longer bearing lower flanch m n m² Manchester line mean deflection Middle ditto middle rib miles per hour nearly neutral axis number of blocks number of cubic opinion ounces plane question quiescent load Railway Bars Rathborn resistance slope Stephenson's strain strength Swiftsure Engine Theodore W tion tons velocity weight of iron Weight of Rail wheel Whole depth Whole weight Woolwich yard
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Seite 89 - In fact, the gain from descent is so exceedingly small in such short planes as we are here considering, that it may be -wholly rejected ; so that in a plane supposed perfectly horizontal, the retardation, or additional resistance to the carriages, caused by the deflection of the bar, will be equivalent to the carriage being carried up a plane of half the whole length on a slope equal to "• the other half being horizontal...
Seite 98 - ... tension of fibre at x. Multiply by the distance x, and breadth b, and we have for the sum of all the resistances this when x = d
Seite 27 - Mr. Barlow came to the conclusion that the strength of a bar should be double that of the mean strain or load. In his first report, he thought from 10 to 20 per cent would be sufficient; that is, for a 12ton engine, as the weight is at present distributed, a strength of 7 tons would be ample provision ; and with greater accuracy of construction, a less strength would suffice; or rather, allowing the same strength, an engine of 14 or 16 tons might be passed over with greater confidence. Thus, for...
Seite 62 - ... body meets the end of a rail rising £, or, perhaps, nearly | of an inch above another; or when the joints are so open as to allow the wheel to fall from one upon the other, with all the impetus due to such velocity. In order to arrive at some estimate of this effect, a bad or open joint was selected, the deflectometer applied to the block, and the shock measured by the instrument. The rail was then taken up and relaid, so as to make the joint as...
Seite 59 - On carefully examining the joints of the rails on the Liverpool and Manchester line, I am disposed to estimate that about one in six of the plain butt joints are as perfect as can well be desired, and that another one in six are as bad as bad workmanship and negliTOL, gence can make them ; the remaining twothirds varying in character between these two extremes.
Seite 7 - I soon determined to adopt; viz. to avoid, as far as possible, argument founded on mere hypothesis, and to substitute for the latter, facts drawn from actual experiments, which should be made publicly, registered generally, and witnessed by any one interested in the decision ; and moreover, as I intended to rest my report entirely on these data, I resolved to offer no opinion, till I had time to analyze and compare my results. I am not certain that this plan of proceeding was quite what the deputation...
Seite 97 - ... years to reduce it to the half of its present strength. NOTE B. Given the area of section of a railway bar below the neutral axis, to find the dimensions of the lower flanch, so that the strength shall be a maximum ; the breadth of the middle rib, and the depth of the lower flanch, being also given : let the whole of the sectional area below nn - - - - - " !=a the breadth of rib pq - — • =6 the depth as - - - - = d' the depth of lower flanch rs - - =t the tension of the lower fibre - - =...
Seite 27 - ... or rather, allowing the same strength, an engine of 14 or 16 tons might be passed over with the greatest confidence. By referring to the observed results in the Appendix, it will be seen, that one rail is sometimes depressed by one wheel a quarter of an inch, while the other wheel is perhaps on a block ; and immediately after the high wheel is depressed, and the lower wheel raised, giving thus a rocking motion to the carriages, the effect of which was rendered remarkably obvious by the little...