Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 679
centre-line, bringing the four wheels into a convenient position on the curve; the tractive forcewhich acts on the front coupling of the car, and the resistance of the subsequent cars which acts on … the coupling of the rear end of the car, tend to change the position of the car-body—the tendencybeing to change the curved line of the whole train into a straight line; this gives lateral forces which
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