Kite-line Parameters
Depending on the kite application and kite system needs, selecting a kite line will consider one or more of the following parameters: availability, base material, color, density, mass per length, size, manufacturer's reports, serial number or product number, diameter, cross-section shape, tensile strength new, aged tensile strength, resistance damage from chemicals, defects, safety factor, resistance to damage from solar radiation (UV stabilization), electrical conductivity, optical conductivity, heat conductivity, moisture intake from water (via humidity, rain, contact with liquid water), buoyancy in water, abrasion resistance, nature of manufacturer's line joins, feel, degradation from knotting, terminal methods, elasticity, structure, signal transmission capacity, visibility to radar, performance over time, maintenance actions, effect on performance from hours of use, drag, negative lift, auxiliary line uses, performance when being reeled under tension, performance when tensed line touches itself, action upon breaking, memory, veil, sleeving, inspectability, surface finish, reaction to heat and cold, taper (as wanted), flexibility, reeling behavior, breaking strength, critical diameter, reliability, test-results portfolio, visibility, twist, plasticity, safety, price. Toy kites sold with a manufacturer's selected line makes the decision easy; the decision is more challenging for custom kite applications. The design and handling of the piano-wire kite line for the high-altitude meteorological observations (1749–1933) was a keen engineering process.
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