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Concept
Paragliding
Summary
Paragliding is the recreational and competitive adventure sport of flying paragliders: lightweight, free-flying, foot-launched glider aircraft with no rigid primary structure. The pilot sits in a harness or in a cocoon-like 'pod' suspended below a fabric wing. Wing shape is maintained by the suspension lines, the pressure of air entering vents in the front of the wing, and the aerodynamic forces of the air flowing over the outside.
Despite not using an engine, paraglider flights can last many hours and cover many hundreds of kilometres, though flights of one to five hours and covering some tens of kilometres are more the norm. By skillful exploitation of sources of lift, the pilot may gain height, often climbing to altitudes of a few thousand metres.
In 1966, Canadian Domina Jalbert was granted a patent for a multi-cell wing type aerial device—"a wing having a flexible canopy constituting an upper skin and with a plurality of longitudinally extending ribs forming in effect a wing corresponding to an airplane wing airfoil ... More particularly the invention contemplates the provision of a wing of rectangular or other shape having a canopy or top skin and a lower spaced apart bottom skin", a governable gliding parachute with multi-cells and controls for glide.
In 1954, Walter Neumark predicted (in an article in Flight magazine) a time when a glider pilot would be "able to launch himself by running over the edge of a cliff or down a slope ... whether on a rock-climbing holiday in Skye or skiing in the Alps."
In 1961, the French engineer Pierre Lemongine produced improved parachute designs that led to the Para-Commander (PC). The Para-Commander had cutouts at the rear and sides that enabled it to be towed into the air and steered, leading to parasailing/parascending.
Domina Jalbert invented the parafoil, which had sectioned cells in an aerofoil shape; an open leading edge and a closed trailing edge, inflated by passage through the air – the ram-air design. He filed US Patent 3131894 on January 10, 1963.
Official source
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