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A box kite is a high-performance kite, noted for developing relatively high lift; it is a type within the family of cellular kites. The typical design has four parallel struts. The typical design has four parallel struts.
When an equidiagonal kite has side lengths less than or equal to its diagonals, like this one or the square, it is one of the quadrilaterals with the greatest ratio of area to diameter. [21] A kite with three 108° angles and one 36° angle forms the convex hull of the lute of Pythagoras, a fractal made of nested pentagrams. [22]
In November 2023 the Formula Kite Asia & Oceania Championships was being held in Shenzhen in China. The championship was won by Chen and her fellow Chinese kitesurfer, Wan Li, took silver with the Polish surfer Julia Damasiewicz third. [2] Formula Kite was contested for the first time as an Olympic sport at the 2024 Summer Olympics.
The lift generated by the kite and other flying characteristics are affected by the kite's angle of attack, which is set by the bridle; the arrangement of lines which terminate the main kite lines and attach to a number of points across the kite's surface. Power kites having 4 or 5 lines come in two variants, fixed bridle and depowerable.
In general, the larger the surface area, the more power the kite has. Kite power is also directly linked to speed, and smaller kites can be flown faster in stronger winds. The kite size—wind speed curve tapers off, so going to a larger kite to reach lower wind ranges becomes futile at a wind speed of around eight knots.
Roughness length is a parameter of some vertical wind profile equations that model the horizontal mean wind speed near the ground. In the log wind profile, it is equivalent to the height at which the wind speed theoretically becomes zero in the absence of wind-slowing obstacles and under neutral conditions. In reality, the wind at this height ...
The scientific significance of Eddy's improvements to kite-flying was short-lived, due to the advent of Lawrence Hargrave's rectangular box kites. Nevertheless, in the year following Eddy's death, a train of ten Eddy kites reaching an altitude of 23,385 feet (7,128 m) set a height record for several years.
The size, aspect ratio, billow, camber, balance and similar design factors all affect how the kite performs. [9] [10] Kites favoring team or precision flying tend to move with more precision and stability, often with a feeling of weight, that taken together make it easier for a team to fly in uniform formation. This style of flying is about ...