This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1887 Excerpt: ...move in space a distance equivalent to X-P, while the dot drags from O to Y to W. This momentary contact of the wheel is rolling friction; and this dragging contact of the dot and ever-recurring face, comprised by O, W, Y, O, is the grinding friction of all flanges; mere beveling of the flange intensifies the friction ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1887 Excerpt: ...move in space a distance equivalent to X-P, while the dot drags from O to Y to W. This momentary contact of the wheel is rolling friction; and this dragging contact of the dot and ever-recurring face, comprised by O, W, Y, O, is the grinding friction of all flanges; mere beveling of the flange intensifies the friction but does not reduce it; and the reader does not need to be told that, if we could get rid of it, it ought to be done. Safety, economy, cost of fares, living pay of the employees, and honest dividends all require it. FLANGE FUICTIONS. In the practice of modern railroading, the flange friction is that due to an inch-flange; this height being found to be the best, considering all things, the frictions due to this flange are varied more or less by the diameter of the wheel. The ever-recurring contact-point of a flange an inch high of a 42-inch wheel drags 13 inches. I have therefore used a right-angled groove-faced wheel, which has no flanges at all, and in the use of which there are no flange or dragging frictions whatever. RIGHT-ANGLED GROOVE-PACED WHEELS PROVED TO HAVE ROLLING CONTACT. This has been so strenuously denied, and the denial supported by argument based upon false a priori conditions, that I propose to devote a little more time to the proof of the correctness of my practice at East Cambridge than I otherwise would. THE PRACTICE OF RIGHT-ANGLED GROOVE-FACED WHEELS. First of all, let me state that when a piece of paper as thin as tissue, or as fragile as a wet newspaper, is laid upon the rail at East Cambridge and run over by such wheels as support my engine and train, no matter how heavily laden, the wheels merely roll over it without grinding it up, as it would if there were flange or dragging frictions. Surely this statement ought t...
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All Editions of The Meigs Railway: The Reason for Its Departures from the Ordinary Practice. Its Departures, and How and Why a Safe Railway Is Possible