u2146 x eq u2062 13 it appears that the angle is dependent on the distance between the sides of the groove 2 u00d7 that distance is dependent on the loaded tension hence diameter of the conveyor if in the unloaded condition the conveyor has a characteristic length u201c l 0 u201d and diameter u201c d r0 u201d then when fully loaded for entry into the first groove on the first sheave 110 its length will be l 1 l 0 u03b4 u2062 u2062 l l 0 u2061 1 e u2062 u2062 t 1 a 1 eq u2062 14 where u201c t 1 u201d is the maximum tension load force on the conveyor d r1 d r0 1 u2212 u03b4d r d r0 1 u2212 u03bc u03b4l eq 15 a 1 u03c0 u2062 u2062 d r u2062 u2062 1 2 4 eq u2062 16 this computation is also iterative since the amount of stretch depends on the degree of shrinkage of cross sectional area the computation begins by assuming the cross sectional area of the unloaded conveyor then correcting the computations as the corrected area in eqn 16 is recalculated the iteration between eqns 14 16 is finished when sufficient accuracy is achieved typically in two to five iterations depending on the elasticity and deformability of the materials based on the diameter determined in eqn 15 the aperture of the parabola at the contact centerline is now known from that dimension given the desired depth of the groove typically but not necessarily two conveyor diameters the value of u201c p u201d in eqn 11 can be determined taking the contact centerline.