The parachute s canopy consists of an upper wing surface, a lower wing surface, and dozens of shaped ribs (wing ribs) distributed in the span direction. The front edge of the canopy has a certain size opening (air inlet); the rear edge is completely closed. In this way, the air chambers are formed by the upper and lower airfoils and the left and right ribs. When the canopy moves relative to the air, the air enters the air chamber through the air inlet, and under the action of the air pressure, a certain pressure is generated in the inner cavity to form the umbrella clothes and maintain a certain rigidity. The holes of different sizes on the ribs allow the air between the air chambers to flow in the span direction to balance the internal pressure of the umbrella and facilitate inflation.
Umbrella rope is used to support and suspend, and it is a force-transmitting member that connects the umbrella clothing with the strap and the control system. The umbrella rope is divided into 3 to 4 groups (called groups A, B, C, and D) after traveling, and is symmetrically distributed on both sides of the central axis of the umbrella clothing. The upper end of the umbrella rope is usually connected by a Y-shaped bifurcation on the underside of the umbrella clothing with the umbrella clothing; the lower end is connected with the front and rear control belts by metal quick-release rings (buckles). The connection points of the umbrella rope and the umbrella clothing are arranged according to the design requirements to maintain a good wing surface shape and stress conditions; its length is determined according to the requirements of handling stability and maintaining angle of attack.
The control system of the paraglider is composed of a control belt, a control rope (brake rope), and a ferrule (control stick). The entire control system is symmetrically distributed on both sides of the centerline of the umbrella suit. The upper ends of the left and right control ropes are also Y-shaped and are connected to the rear edge of the umbrella suit by a few points. Connected in circles. The left and right control bands are divided into two front and rear. The upper end of the front control belt is connected to the umbrella ropes of group A and B through a quick release ring. The upper end of the rear control belt is also connected to the umbrella rope bundles of group C and D by a quick release ring. There are also paragliders that connect the D-cord rope to the rear control belt, while the C-cord rope is connected through a transition belt connected to the front and rear operating belts (Figure 2). Paragliders are usually equipped with a foot-operated acceleration sy stem, as shown in Figure 2. Its role is to increase flight speed when needed during flight. The upper end of the control rope of the acceleration system is connected to the front control belt, and the leading edge of the umbrella clothing is pulled down by a pulley system with a certain transmission ratio to reduce the angle of attack. The lower end is led forward by the buckles on both sides of the strap system seat, which is connected to the metal pedal lever.
The strap system is also called a seat belt or sling, which is a load-bearing control belt that fixes the pilot s human body and connects with the entire umbrella system and adds this system component. The strap system is mainly composed of straps ( including shoulder straps, brain straps, belts and crotch straps), back cushions, seat cushions, metal ring buckles and quick release locks. Paraglider strap systems come in 4 basic forms: vertical, seated, supine, and steerable (Figure 3). Among them, the vertical strap follows the traditional parachute strap style, with the simplest structure and light weight, but because it lacks sufficient support for human body weight, it is not suitable for long-term gliding and has been eliminated. The seat belt is the most commonly used style, it has sufficient support for the human body, and it is more comfortable to fly. The supine strap can keep the pilot in a semi-lying state during flight, and the back, legs, and even the head can be effectively supported and relaxed, which is more comfortable than the seat strap. Three control belts (or four control belts) controllable control belts. Horizontal straps. System type straps allow pilots to use the forward or backward leaning to maneuver umbrellas in flight. Due to the complicated control technology, it is not suitable for beginners., Generally used by more skilled high-performance paraglider pilots. The design requirements for the strap system are mainly its comfort and safety. Comfort requires structural dimensions to conform to the shape of the human body and to keep the human body in a state of maximum relaxation during flight, reducing fatigue; and safety requires that the pilot cannot maintain a standing landing, or falls, hits an obstacle or is touched by the landing. Can effectively protect the human body when dragged. Therefore, the modern strap system is filled with thicker sponge rubber under the seat, and the more advanced one is equipped with an inflatable air cush ion; a fixed or movable fiberglass back panel is installed in the back cushion to enhance the back of the human body. And spine protection. In addition, the harness system also has space for life umbrellas and counterweight water bags (heavy objects).
Rescue parachutes (also known as parachutes or backup parachutes) are essential equipment to ensure that the pilot can safely return to the ground when the paraglider is incapable of flying in the air. There are three main types of life umbrellas used with paragliders: ordinary round umbrellas-this is the most basic type of life umbrella used. It has good reliability and stability, moderate umbrella opening time, large declining speed, slightly larger packaging volume and a little child, but the price is cheap. The multi-cone umbrella has a milky top protruding one by one, the resistance is greater than that of a normal round umbrella, the descending speed is small, the umbrella opening time is medium, the packaging volume is small, the weight is light, but the price is slightly higher . Pulling down the vertex umbrella one by one, the top of the umbrella is sunken to make the bottom side support, the resistance is large, the falling speed is the smallest, the packaging volume is small, the weight is light, but the price is high.