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History of flying Kites
HAVE FUN WITH KITES The box kite was invented by an Australian,
Lawrence Hargrane, in the 1890's. Box kites are very popular though more
difficult to construct than plane surface kites. Box kites are so called
because of their rectangular shape, the frame being twice as long as its
width; the ends are left uncovered, with 1/3 of the length covered around
each end.
The bridle consists of 2 lines, one attached to each end. The kite needs no tail. It flies on one edge; that is, with one of its edges facing down. The shape can be other than square in cross section; it may be oblong and fly on a wide side with a 4 leg bridle, or it may be triangular, round (barrel kite), or even 5 or 6 sided. In 1902 the American Silas Conyne added side wings to a triangular box kite, the first of many winged box kites. It is known as the Conyne, or French military, kite. The principle that enables a kite to fly is the same as that which keeps an aircraft in the air. An airplane creates its own wind by its speed through the air. On a calm day running with a kite in an open space produces the same effect. The kite rises because currents of air that move parallel to the ground hit the face of the kite and force it backward. |
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The best wind for kite flying is a steady breeze with a speed of about Eight to Twenty miles (Thirteen to Thirty-Two kilometers) per hour. Less wind makes it difficult to get the kite to rise. Stronger winds may force the kite to the ground before it has a chance to rise to a safe height. The line, or string, holds the kite steady, with the face of the kite tipped forward, and the wind pushes up on the tipped face to lift the kite, much as a wedge pushed under an object lifts it. If the kite was not attached to the kite string, the kite would be whirled away and would fall to the ground. The kite rises also because of a reduction in pressure on the upper surface known as the Bernoulli effect. |
A kite should not be flown on rainy days, since a wet kite string is a very good conductor of electricity. Wire should never be used for a kite string, and the kite should never be flown where there are electric power lines because of the danger of electrocution.
This article is in three parts. Kites Box Kites Fighting Kites
By now that you have a list of potential colleges that you want to attend, it’s time to contact the coach at each school. The simplest way to do this is to send a highlights DVD along with your resume and a letter of introduction.
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Canasta was invented in Uruguay in the early twentieth Century, it is a classic card game that spread to the USA in 1949. The name of the game, which means "basket" in Spanish, may come from the tray used to hold the stock and discards.