Noyes and Pfieffer (1985) used a number of graphs for determination of required design parameters.
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These graphs, which were originally published in British Imperial units, were reproduced in SI units for universal access.
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In order to determine the various physical parameters that were subse-quently required in the design process, coefficients desig-nated as “classes” and “factors” were evaluated.
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These coefficients depended on the physical properties of the material to be conveyed (in this case, soybeans).
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The factors evaluated were: