Kites are tethered flying objects which fly by using aerodynamic lift, requiring wind (or towing) for generation of airflow over the lifting surfaces.
Various types of kites exist, [1] depending on features such as material, shape, use, or operating skills,Wind required. Kites may fly in air, water, or other fluids such as gas and other liquid gaining lift through deflection of the supporting medium. Variations in design of tethering systems and lifting surfaces are regularly introduced, with lifting surfaces varying in stiffness from limp sheet material to fully solid material. [2] [3]
Kites may be built by the flier or by a dedicated kite manufacturer, which may be a member of the Kite Trade Association International (KTAI), which also includes kite retailers. [4]
Kites have been made from the following materials:
Kites are normally heavier than their supporting medium, such as a kite flown in air. Some kites have their lift augmented by lighter than air gases, allowing the kite to remain airborne without wind or being towed. [24]
Hydro dynamic kites can have positive, neutral or negative buoyancy, relying on hydrodynamic lift to manoeuvre, rise, or dive. [25] [26] [27] [28] [29] [30] [31]
Kites can be controlled by various methods which usually involve manipulation of the tether/control lines, lifting gas density control and in some cases by aero-dynamic control surfaces. [32] [33] [34]
Kites can have positive, neutral or negative stability, in all axes of control, in the same fashion as aircraft. Kites with positive stability tend to return to a stable state automatically, whereas those with neutral or negative stability require control inputs to return the kite to the required position or attitude. [35] [36] [37] [38] [39]
Kite flying has been enjoyed for thousands of years in South Asia and the Indian subcontinent. The goal is to cut off the rival kite (usually flown by someone on a neighbouring rooftop). In order to cut the "enemy's" kite line, a very strong fishing line, prepared with glue and powdered glass covers some length of the kite line or wire. The kites themselves are usually of a standard size and shape (square shape) and mostly made from paper and split bamboo. After a kite is cut down, it has to be recovered by the cutting party. The last flying kite wins the game. The government of Pakistan has repeatedly outlawed this sport. [40] It claimed that some people had been decapitated by driving with their scooters or motorbikes across abandoned glass powder & glue prepared kite wire. [41] Others have fallen off roofs while engaging in kite flying.[ citation needed ] Other reasons that were given[ who? ] was that the mass sport and its associated festivals of Basant are considered "unislamic" and connected to Hinduism. Kite flying was also banned in Afghanistan during the reign of the Taliban. [42] However, large sections of society simply ignore the ban.[ citation needed ] Since there was outrage over the ban, the government of Punjab has lifted the ban, however a ban on powdered glass wire has been imposed, as well as the thickness of the wire itself. [43]
Barn door kites are very similar to an eddy kite except that barndoor have two vertical diagonal spars in contrast to the diamond's single vertical spar.
A ringed UFO rotary kite patent indicated a special bridling ring and a central rotating ring (US Patent 4779825). [308] The very high aspect ratio rotating spanwise ribbon kites (Skybows) are continuing to gain interest; these require at least two swivels. Also, a variety of rotary kites that are nearly streamers rotate almost windward; some are vaned and some are not. [309] [310] In 1995 Carl E. Knight and Jo Ann F. Knight instructed a rotary kite that rotates near windward for its axis (not like autogyro or spanwise magnus). [311]
An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or the dynamic lift of an airfoil, or, in a few cases, direct downward thrust from its engines. Common examples of aircraft include airplanes, helicopters, airships, gliders, paramotors, and hot air balloons.
A kite is a tethered heavier-than-air or lighter-than-air craft with wing surfaces that react against the air to create lift and drag forces. A kite consists of wings, tethers and anchors. Kites often have a bridle and tail to guide the face of the kite so the wind can lift it. Some kite designs do not need a bridle; box kites can have a single attachment point. A kite may have fixed or moving anchors that can balance the kite. The name is derived from the kite, the hovering bird of prey.
Unpowered aircraft can remain airborne for a significant period of time without onboard propulsion. They can be classified as gliders, lighter-than-air balloons and tethered kites. In the case of kites, lift is obtained by tethering to a fixed or moving object, perhaps another kite, to obtain a flow of wind over the lifting surfaces. In the case of balloons, lift is obtained through inherent buoyancy and the balloon may or may not be tethered. Free balloon flight has little directional control. Gliding aircraft include sailplanes, hang gliders, and paragliders that have full directional control in free flight.
A fixed-wing aircraft is a heavier-than-air aircraft, such as an airplane, which is capable of flight using aerodynamic lift. Fixed-wing aircraft are distinct from rotary-wing aircraft, and ornithopters. The wings of a fixed-wing aircraft are not necessarily rigid; kites, hang gliders, variable-sweep wing aircraft, and airplanes that use wing morphing are all classified as fixed wing.
Ultralight aviation is the flying of lightweight, 1- or 2-seat fixed-wing aircraft. Some countries differentiate between weight-shift control and conventional three-axis control aircraft with ailerons, elevator and rudder, calling the former "microlight" and the latter "ultralight".
Lawrence Hargrave, MRAeS, was an Australian engineer, explorer, astronomer, inventor and aeronautical pioneer.
Kite types, kite mooring, and kite applications result in a variety of kite control systems. Contemporary manufacturers, kite athletes, kite pilots, scientists, and engineers are expanding the possibilities.
A powered parachute, often abbreviated PPC, and also called a motorized parachute or paraplane, is a type of aircraft that consists of a parafoil with a motor and wheels.
A parafoil is a nonrigid (textile) airfoil with an aerodynamic cell structure which is inflated by the wind. Ram-air inflation forces the parafoil into a classic wing cross-section. Parafoils are most commonly constructed out of ripstop nylon.
Airborne wind energy (AWE) is the direct use or generation of wind energy by the use of aerodynamic or aerostatic lift devices. AWE technology is able to harvest high altitude winds, in contrast to wind turbines, which use a rotor mounted on a tower.
A man-lifting kite is a kite designed to lift a person from the ground. Historically, man-lifting kites have been used chiefly for reconnaissance. Interest in their development declined with the advent of powered flight at the beginning of the 20th century. Recreational man-lifting kites gradually gained popularity through the latter half of the 20th century, branching into multiple sports. In the 21st century man-lifting kites are often used in kitesurfing, where brief launches can be followed by safe water landings and parasailing, where kites are towed behind a vehicle.
The ram-air inflatable single-line kite is one of the few modern inventions in the world of kite design. Although Francis Rogallo's early kite patents had ram-air members in the claims, Domina Jalbert's parafoil ram-air wing, patented in 1944, emphatically changed the kite airscape for inflatable kites.
A glider is a fixed-wing aircraft that is supported in flight by the dynamic reaction of the air against its lifting surfaces, and whose free flight does not depend on an engine. Most gliders do not have an engine, although motor-gliders have small engines for extending their flight when necessary by sustaining the altitude with some being powerful enough to take off by self-launch.
In kiting, a line is the string or thin cord made of cotton, nylon, silk, or wire, which connects the kite to the person operating it or an anchor. Kites have a set of wings, a set of anchors, and a set of lines coupling the wings with the anchors. Kite lines perform various roles: bridle, control, tug, or special duty.
Domina Cleophas Jalbert (1904–1991) invented the ram-air inflated flexible wing, often called the "Jalbert parafoil".
Different types of flying kites have niche applications. In nature, some animals, such as spiders, also make use of kiting.
Kite mooring refers to a specific method used to secure a kite in flight. The two fundamental parts of a kite are the wing and the kite line. The kite must be moored to a mobile or fixed object to develop tension in the kite line which converts to lift and drag, enabling the kite to fly.
A kytoon or kite balloon is a tethered aircraft which obtains some of its lift dynamically as a heavier-than-air kite and the rest aerostatically as a lighter-than-air balloon. The word is a portmanteau of kite and balloon.
A tumblewing or "tumble wing" or "tumbling wing" is a glider or kite wing design which rotates about an axis transverse to the apparent wind, not necessarily horizontal. Tumble wings are frequently employed in wind turbines, and are also used in some types of confetti.
Crosswind kite power is power derived from airborne wind-energy conversion systems or crosswind kite power systems (CWKPS). The kite system is characterized by energy-harvesting parts flying transversely to the direction of the ambient wind, i.e., to crosswind mode; sometimes the entire wing set and tether set are flown in crosswind mode. From toy to power-grid-feeding sizes, these systems may be used as high-altitude wind power (HAWP) devices or low-altitude wind power (LAWP) devices without having to use towers. Flexible wings or rigid wings may be used in the kite system. A tethered wing, flying in crosswind at many times wind speed, harvests wind power from an area that exceeds the wing's total area by many times.
She observes that the so called ballooning is like a kite or balloon; she is mechanically correct about the kite part, as no true balloon is ever formed by the spider as told in the other references
the "Balloon Spider" is correctly seen as mechanical kiting