

Over the millennia, kites have been used to ward off evil, deliver messages, represent the gods, raise banners, discover natural phenomena, propel craft, drop propaganda leaflets, catch fish, spy on enemies, send radio signals, measure the weather, photograph the Earth, and lift passengers skyward. Modern kites are flown mostly for pleasure and sport, in addition to being a folk form of artistic expression. The kite was the ancestral aircraft that launched manned flight.




After its appearance in China, the kite migrated to Korea, Japan, Myanmar (Burma), India, Arabia, and North Africa, then farther south into the Malay Peninsula, Indonesia, and the islands of Oceania as far east as Easter Island. Since kites made of leaves have been flown in Malaya and the South Seas from time immemorial, the kite could also have been invented independently in that region.

fighter kite [Credit: © Eden Maxwell]fighter kite© Eden MaxwellOne ancient design, the fighter kite, became popular throughout Asia. Most variations, including the of India and Japan, are small, flat, roughly diamond-shaped kites made of paper, with a tapered bamboo spine and a balanced bow. Flown without tails that would hinder their agility, these highly maneuverable flat kites have a length of cutting line coated with an abrasive attached to the bridle (see below Aerodynamics), which is then tied to a light cotton flying line. Although the rules of kite fighting varied from country to country, the basic combat was to maneuver the swift kite in such a way as to cut the opponent’s flying line.

Europe and the West

Kite flying began much later in Europe than in Asia. While unambiguous drawings of kites first appeared in print in Holland and England in the 17th century, pennon-type kites that evolved from military banners dating back to Roman times and earlier were flown during the Middle Ages.


Franklin, Benjamin [Credit: © North Wind Picture Archives]Franklin, Benjamin© North Wind Picture ArchivesThree years later, in June 1752, in what is the most famous of kite experiments, the American inventor and statesman Benjamin Franklin, with the aid of his son, lofted a flat kite fitted with a pointed wire and silk sail during a thunderstorm. Somehow both father and son avoided electrocution as a metal key attached to the flying line became electrified. Franklin proved that lightning was the natural phenomenon called electricity, not the wrath of the gods. One immediate and practical outcome of the experiment was Franklin’s invention of the lightning rod.

The first manned flights

Although kites had been used as man lifters since ancient times, the kite’s greatest technological contribution was in the development of the airplane. In the 19th century the British scientist Sir George Cayley, known as the father of aeronautics, used modified arch-type kites to make “flying machines,” which in 1853 led to the first recorded manned flight in a glider. Cayley’s comprehension of both thrust and lift was the leap in understanding that would ultimately quell the ancient and faulty obsession with flapping wings as a means for manned flight. Other visionaries built man-lifting kites, many of which were rudimentary biplane gliders. Otto Lilienthal of Germany experimented with “aeroplane” kites in the 1890s and became the first man to soar in one of his kites in true hang-gliding fashion.

Around 1900 Orville and Wilbur Wright, self-taught aeronautical engineers who ran a bicycle shop in Ohio, began testing their biplane designs as kites. It was the Wright brothers who first focused on control—the missing ingredient for manned flight that had baffled other aviation pioneers. The brothers constructed a special box kite and braced the wings with wires in such a way that they could be twisted in opposite directions to make the kite bank and turn. They called the principle “wing warping,” and it was the breakthrough that had eluded the great inventors who had worked on flight—from Leonardo da Vinci to Alexander Graham Bell.

With the invention of the airplane, the kite fell from favour among adults. Except for occasional meteorologic survey work, which continues to the present, the kite’s status changed from a serious scientific instrument to a child’s toy once again.

Kite structure

The form and size of kites are remarkably varied. Some kites can fly in the lightest breeze, while other designs require steady winds. Kites can be made of two sticks covered with a sail material or be constructed in a configuration requiring a complex framework. Until recently, the materials for constructing kites—bamboo or wood, fabric or paper, and string—had remained essentially unchanged for more than 2,000 years. Today, kites are often built with synthetic materials.

There are eight generic kite types. The flat, bowed, box, sled, and delta require a rigid framework fitted with a sail material, as does the compound, which is formed by integrating two or more of the above types to form one kite. A radical departure in design, the parafoil, a soft airplane-wing shape with no rigid members, used by the skydiver as a parachute, assumes its efficient flying profile entirely from the wind’s inflating the air channels along the leading edge. Another deviation in form is the rotor, a kinetic kite that manifests lift and the Magnus effect through a horizontal spinning vane sandwiched between two cylinders—a rigid frame and sail in one.

Although tailless kites had been common in Asia for centuries, it was not until 1893 that William A. Eddy, an American journalist with an interest in meteorology and kite aerial photography, made a significant contribution to kite development in the West by introducing his now-familiar tailless, elongated diamond-shaped design. The Eddy kite, an adaptation of the ancient Javanese bowed kite known as the Malay in the West, was a reliable and popular flier that ignited a renewed interest in kite flying and was briefly used by the United States Weather Bureau. In Australia that same year, British-born explorer and inventor Lawrence Hargrave contrived the box kite, or cellular kite, as a by-product of his research to develop a stable three-dimensional lifting surface for powered manned flight. Exceptionally steady in high winds, Hargrave box kites flown in train, using flying line of piano wire, soon replaced the Eddy kite and were used for meteorologic work well into the 1920s.


Regardless of the design, a kite must conform to the laws of aerodynamics and embody three fundamental characteristics: an aerodynamic structure to gain lift from the wind, a tether to keep it from blowing away, and a bridle to direct the kite face at the proper angle to the wind. A bridle consists of two or more lines attached directly to the kite face. The bridle lines are connected to each other, forming a tow point adjustable for the prevailing wind conditions. One end of the tether is connected to the tow point, and the other end is most often attached to a hand-held reel in order to manage the flying line efficiently. Some kite designs do away with bridles altogether by having their tethers connected directly to a fixed fulcrum point along the mast or to a keel (as with the delta kite) or series of fins (as with the parafoil) attached perpendicularly to the lifting surface. Locating a kite’s precise fulcrum, or tow point, allows successful flight.

Three main forces control kite flight: lift, gravity, and drag. A kite flies because the lifting force of the wind overcomes both the downward pull of gravity and air resistance to the forward motion of the kite called drag. When tethered and fixed in a position to gain lift from the wind, a kite maintains a perpetual stall—a poor aerodynamic design for an airplane but essential for a kite flying at a stable and positive angle with respect to the horizon.

Flat kites require a tail for drag, which keeps the nose up and creates balance, much like a raft needs a rudder for directional stability. Bowed kites with a bowline strung across the back do not require a tail, since the face takes on a curve, or dihedral angle, which acts much like the bowed hull of a sailboat utilized for self-correcting buoyancy. The box, compound, sled, delta, parafoil, and rotor are inherently stable and typically do not require tails.

Launching and kite safety

Running with a kite is not a good way to launch it. Instead, one should opt for a high start launch, in which one flyer stands about 100 feet (30 metres) downwind, with the kite facing bridle-side to the other flyer, who holds the end of the kite’s line. With a steady breeze behind, a small amount of tension placed on the line allows the kite to rise effortlessly upward. A kite may also be self-launched by letting the kite fly from the flyer’s hand as it takes out line.

The potential hazards of kite flying should be taken seriously. Metals should never be used in the kite line, and kites should be flown in wide-open spaces. Care should be taken to avoid flying in stormy weather or near power lines, public streets, areas congested with people, highways, or airports. Finally, protective gloves should be worn to prevent serious line burn when flying hard-pulling kites.

Modern kite sports





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