CHAPTER III
KITES: WHERE FOUND; HOW MADE; THEIR PRACTICAL USES; CLOSELY RELATED TO AEROPLANES—A GREAT SPORT
Spring winds favor kite flying. This is another world-wide sport, and it was popular with old and young in China—the land of the kite—at the time when the Egyptians were cutting stones for the pyramids. Everybody knows, or should know, what the great Ben. Franklin did by means of a kite, though the kite through which he learned the nature of lightning was of a model that is not often seen at this time. This was the old bow kite, the kind that every beginner learns to make, and which needs no detailed description here.
The hexagonal or coffin-shaped kite is more reliable than the old sort, and is quite as cheap and as easily made. Kites of both these kinds have been used to get a line from a stranded vessel to the shore, and engineers have used them. They did it when the first suspension bridge was built at Niagara, to get a line across the chasm, which gradually grew into the great suspending cables.
Kites have been used to draw light vehicles over smooth ground, and they make good sport when made to draw sleds over the ice, or as "top- loftical" sails for small boats. I have seen in New York a tandem team of ten kites used for advertising purposes.
The Star Kite is easily made and is well worth doing. Get three sticks or sections of light string, both of equal length. These are fastened in the center, so that, with the ends of the sticks equal distances apart, they will form a six-pointed star. The covering should be of thin, close cotton cloth, or, better still, of light, strong paper, which must be pasted so as to present the side of greatest resistance to the wind, else it will soon be blown off. The tail band is simply a loop fastened to the sticks at the bottom so that it will hang below the kite, and balance it when it ascends. The belly-bands for support and steering—in the latter case two lines are used—must never be attached below the central cross-piece.
Boys often find fun in sending "messengers" up the strings to the kites. After the kite is up a good height, round pieces of colored paper with a hole in the center and a slit by means of which they are slipped on the string, are sent up. They travel with the speed of the wind till they reach the kite, where they stop. If too heavy, or too many, the messengers may get the kite out of balance.
A messenger has been sent up 6,000 feet, or over one mile. That is the height to which American scientists have sent kites with thermometers and barometers attached, so as to record the elevation and the temperature.
THE HARGRAVE, OR BOX KITE,
is something new and hitherto unheard of in the kite line. Rigidity and strength, without too much weight, are the prime essentials of the Hargrave. It may be made by a boy with a knack for mechanics in the following way: Take eight stiff, slender pieces of bamboo, eighteen and three-quarter inches in length, such as are sometimes used for fishing poles. These pieces must be of uniform weight and length, and as nearly alike as possible. Next cut six sticks, each eleven inches long, and as nearly alike as possible. These are for the middle uprights and end stretchers. After finding the middle of the longer sticks, lash them together in pairs by means of stout waxed thread, or light brass wire. Notch the ends of the sticks and make the spread between A and C just eleven inches. This will give you four pairs of crossed sticks. Next take one of your eleven-inch uprights, and bind it to the two pairs of cross-sticks. Take the other eleven-inch upright and fasten the other two pairs of cross-sticks in the same way.