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Simplified schematic showing (a) side and (b) end views of a cylindrically shaped spider leg or cricket cercus of diameter D with a cylindrically shaped hair of diameter d and length L projecting normal to the substrate surface. The relevant (y, z) coordinates are defined. Note that R=1+(y/(D/2)) is the dimensionless hair length with origin at the centre of the large cylinder so that R=1 (y=0) corresponds to the substrate surface and R L=1+(L/(D/2)) corresponds to the tip of the hair.
