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Paragliders maintain their wing profile as a consequence of
a „ram-air" pressurisation. This lets air in through the cell openings near the leading
edge, creating a lifting wing shape. Stability is created by the location of the pilot hanging well below the
wing. The use of controls (brakes), which go to the trailing edge, causes the wing to be more or less braked (slowed).
Symmetrical braking causes the paraglider to slow and asymmetrical braking causes the paraglider to turn.
The ATIS is an elliptical plan glider constructed with 53 cells. The last four cells at each wing tip are closed. The ATIS is suspended at every third cell. At the
harness connection, the ATIS has four main risers (A, B, C and D) with additional E-risers branching off the D-risers on sections 4 and 10. In all, there are
80 connection points to the wing.
„V"-ribs, or diagonal reinforcements are used to spread the load from the lines in an efficient manner while maintaining a smooth profile and reducing drag. The ATIS diagonals, reinforcing
span wise tape and reduced line platform add up to a complex and sophisticated design for a glider in this class and is one of the explanations for the exceptional performance of the ATIS.
Diagonal Reinforcement
Upper Surface
Rib
The ATIS is equipped with "split" A-risers to facilitate the "big-ears" descent manoeuvre (section 2.5.2). The brake
(or "control") lines are run through a pulley connected to the D-riser. The brake line length is set at the factory and is clearly
marked. Do not alter the brake line length. Resistance should be felt in flight after about 5 centimetres of travel.
Bottom surface
Loops
Lines
Fig. 1
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