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glider, type of aircraft resembling an airplane but having at most a small auxiliary propulsion plant and usually no means of propulsion at all. The typical modern glider has very slender wings and a streamlined body. The unpowered variety is launched by an elastic shock cord, a rope, or a cable, attached to the front of the glider and pulled by a launching crew, a winch, a tow car, or a tow plane. Gliders can be towed behind airplanes over great distances. The powered variety can take off and climb on its own.

The glider uses gravity and updrafts of air to keep it flying; slope soaring relies on wind rising off dunes or hillsides, while thermal soaring exploits convection currents in the air. In soaring the glider is repeatedly maneuvered through updrafts to reach altitudes as high as 46,000 ft (14,000 m). It can then glide down through air that is not rising. In a powered glider the engine can be turned on to keep the glider aloft when there are no updrafts. A sailplane, a glider which is built especially for soaring and sustained flight, can travel as much as 500 mi (800 km) in this manner. The usual flight controls in a glider consist of a pedal to operate the rudders and a control stick to operate the elevators and ailerons.

Otto and Gustav Lilienthal of Germany made the first successful piloted glider flight in 1891. The Lilienthals demonstrated the superiority of curved over flat surfaces in flight and encouraged others to make glider experiments, at least until Otto's death in a glider crash in 1896. At the beginning of the 20th cent. the Wright brothers constructed and flew many gliders. They introduced land skids, wing warping, and other improvements that characterize present-day gliders. In World War II troop-transport gliders were used for aerial invasions. The gliders were launched and towed by cargo aircraft to the invasion area, where they were released.

Early gliders were launched from hills or by running forward; the machine maintained stability while in flight by the pilot's shifting body weight. These techniques have been resurrected in modern hang gliding, a development based on NASA experiments with flexible-wing gliders in the 1950s. The hang glider, with nylon or Kevlar stretched over an aluminum frame, can reach an altitude of 20,000 ft (6,100 m) and stay aloft up to 15 hours; in 1979 five hang glider pilots flew their machines (fitted with auxiliary motors) across the United States. A paraglider is an parachutelike airfoil made of nylon and Mylar from which the pilot is suspended by a series of ropes. Paraglider pilots must “kite”—raise the airfoil into the air by running and using the wind—before launching themselves from a cliff or the like.


See T. L. Knauff, Glider Basics from First Flight to Solo (1982); D. Piggott, Gliding (5th ed. 1987).

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(aerospace engineering)
A triangular device on a rocket or spacecraft that consists of two flexible sections and resembles a kite; deployed to assist in guiding or landing a spacecraft or in recovering a launching rocket.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
"I want to invite the youth of Oman to see that if a blind person can paraglide, then so can they because paragliding is a safe sport," he said.
This year, Project Airtime provided a scholarship to a man who is a paraplegic to learn to paraglide by himself.
Mods Aune, 34, Norwegian paraglider held paraglide jump from 1800 meters slopes of Babaday- Mount but at his last 200 meters of his jump, he suddenly lost his wing balance and fell down on the craggy rocky area and got serious injuries.
You can waterski, wakeboard, windsurf and sail, paraglide or try a jetski or banana boat.
Want to paraglide? How about taking a turn on a jet ski?
He said that Africa is "an amazing-value destination" and that experiential travel is booming to such a degree that Mantis has launched Mantis eXtreme for those who want to paraglide off Cape Town's Table Mountain, or go shark diving, whale watching in the Western Cape or diving the sardine run in Eastern Cape.
Travel Business Review-December 24, 2012--Tourism officials in Ghana to train local paraglide pilots(C)2012] ENPublishing -
Hiding in a dense bush lets you remain hidden from unfriendly eyes (there are pirates all over the island), fire isn't just for show but it burns and kills, trapped animals can kill and devour your enemies (and you, too, if you aren't careful) if you lead them on, you can paraglide off a cliff or swim submerged through a waterbody to move around.
If the mood takes you, enjoy a 40 minute paraglide down from the beautiful mountain peak landing on the beach front lagoon at Olu Deniz.
London, Mar 21 ( ANI ): A great grandmother in the US became the oldest woman in the world to paraglide, after she took the flight to celebrate her 101st birthday.
Based on a minimum two-night stay, this romantic package for two includes accommodation in a beach-front pool villa, a paraglide jump, a sunset cruise with house beverages and canapes, an in-villa barbeque, a sunrise breakfast on the beach, couple's signature spa treatment, and a destination dinner option all for two people.