Rolling friction was increased by flange contact and by sand or leather on surfaces. It was but slightly decreased by water. It could be increased by a thick oil film and decreased by a thinner one. Increasing the wheel hardness diminished rolling friction. Roughness raised static resistance with little effect on kinetic.
Rolling Friction, IV—Additional Car Wheel Experiments
M. D. Hersey
Brown University, Providence, R. I.
P. L. Golden
U. S. Bureau of Mines, Pittsburgh, Pa.
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Hersey, M. D., and Golden, P. L. (January 1, 1970). "Rolling Friction, IV—Additional Car Wheel Experiments." ASME. J. of Lubrication Tech. January 1970; 92(1): 83–86. https://doi.org/10.1115/1.3451352
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