Paragliding

Paragliding is a recreational and competitive flying sport. A paraglider is a free-flying, foot-launched aircraft. The pilot sits in a harness suspended below a fabric wing, whose shape is formed by the pressure of air entering vents in the front of the wing. more...

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Equipment

The paraglider wing or canopy is known in aeronautical engineering as a ram-air airfoil, or parafoil. Such wings are comprised of two layers of fabric which are connected to internal supporting material in such a way as to form a row of cells. By leaving most of the cells open only at the leading edge, incoming air (ram-air pressure) keeps the wing inflated, thus maintaining its shape. When inflated, the wing's cross-section has the typical teardrop aerofoil shape.

The pilot is supported underneath the wing by a network of lines. The lines are gathered into two sets as left and right risers. The risers collect the lines in rows from front to back in either 3 or 4 rows. The risers are connected to the pilot's harness by two carabiners.

The pilot is loosely and comfortably buckled into a harness which offers support in both the standing and sitting positions. Modern harnesses are designed to be as comfortable as a lounge chair in the sitting position. Many harnesses even have an adjustable 'lumbar support'.

A reserve parachute is also typically connected to a paragliding harness.

Paraglider wings typically have an area of 20-35 m² with a span of 8–12 m, and weigh 3–7 kg. Combined weight of wing, harness, reserve, instruments, helmet, etc. is around 12–18 kg.

The glide ratio of paragliders ranges from 8:1 for recreational wings, to about 11:1 for modern competition models. For comparison, a typical skydiving parachute will achieve about 3:1 glide. A hang glider will achieve about 15:1 glide. An idling (gliding) Cessna 152 will achieve 9:1. Some sailplanes can achieve a glide ratio of up to 60:1.

The speed range of paragliders is typically 20–50 km/h (12-30 mph), from stall speed to maximum speed. Beginner wings will be in the lower part of this range, high-performance wings in the upper part of the range. The range for safe flying will be somewhat smaller.

Modern paraglider wings are made of high-performance non-porous fabrics such as Porcher Sport & Gelvenor, with Dyneema/Spectra or Kevlar/Aramid lines.

For storage and carrying, the wing is usually folded into a rucksack (bag), which can then be stowed in a large backpack along with the harness. For pilots who may not want the added weight or fuss of a backpack, the harness itself can be used to carry the wing, though this is less comfortable, and thus less favorable for longer hikes. In this case the wing (within the rucksack) is buckled into the harness seat, which is then slung over the shoulders. Recent developments in light-weight harness design include the ability to turn the harness inside out such that it becomes the backpack, thus removing the need for a second storage system.

Read more at Wikipedia.org