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" ... easement curve, it appears that the very best conditions possible to adopt for fixing it are to assume, first, that the car, in tilting to the difference of rail elevation as it passes along the easement curve, shall rotate about a longitudinal axis... "
Railroad Economics: Or, Notes, with Comments from a Tour Over Ohio Railways ... - Seite 71
von Stillman Williams Robinson - 1882 - 131 Seiten
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Transactions of the American Society of Mechanical Engineers

American Society of Mechanical Engineers - 1881
...shall rotate about a longitudinal axis passing through the centre of gravity of its cross-section ; and second, that it be accelerated in that tilting...of a slight change in his own weight while on the casement curve. That change of weight will be an increase if outside and going from the tangent, and...
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Proceedings of the ... Annual Meeting

1889
...shall rotate upon a longitudinal axis passing through the center of gravity of its cross-section ; and, second, that it be accelerated in that tilting...versa. This change of weight, however, should be made imperceptible, and it is believed so to be when the radius of curvature varies inversely as the square...
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