Abstract
The equations of netting weight in air are very important in designing fishing gears. We developed some equations of English knot nylon netting weight in air for a single mesh (ω: weight of two legs and one knot) and for one strip of netting (W: weight of a 100 fathom length with a depth of 100 meshes), The latter derived from the equations of a single mesh. In order to determine the constants of the equations, we used the Twine Weight Table and measured different factors of netting. Weight (W) is represented by both the number of yarns (n) and mesh size (Lm), asW=C1•n+C2•(n3/2/Lm), whereC1and C2 are the constants. Using the constants determined by the measurements, ω and W can be written respectively as follows;ω=π•(D/2)2(L+9•D)•ρ and W=n{1+(√n/3•Lm)}, where D is the diameter of twine, L is the length of one leg, and ρ is the density of twine.
