Sport kites can be flown in aerial ballet, sometimes as part of a competition. Kites may be flown for recreation, art or other practical uses. Kites have a long and varied history and many different types are flown individually and at festivals worldwide. Man-lifting kites were made for reconnaissance, entertainment and during development of the first practical aircraft, the biplane. Paravanes and otter boards operate underwater on an analogous principle. The same principles of fluid flow apply in liquids, so kites can be used in underwater currents. The anchor point of the kite line may be static or moving (e.g., the towing of a kite by a running person, boat, free-falling anchors as in paragliders and fugitive parakites or vehicle). The resultant force vector from the lift and drag force components is opposed by the tension of one or more of the lines or tethers to which the kite is attached. The interaction with the wind also generates horizontal drag along the direction of the wind. The lift that sustains the kite in flight is generated when air moves around the kite's surface, producing low pressure above and high pressure below the wings. The name is derived from the kite, the hovering bird of prey. A kite may have fixed or moving anchors that can balance the kite. Some kite designs don't need a bridle box kites can have a single attachment point. Kites often have a bridle and tail to guide the face of the kite so the wind can lift it. A kite consists of wings, tethers and anchors. This sparless, ram-air inflated kite, has a complex bridle formed of many strings attached to the face of the wing.Ī 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. Star-shaped kite above a meadow south of Hockenheim.
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