design feature
Paragliders usually consist of four parts: wing-shaped canopy, parachute rope, strap system and control system. In order to facilitate the storage, carrying and transportation of paragliders, each paraglider is also equipped with a back packaging bag.
Wing canopy
Airfoil canopy, also known as umbrella wing, is the main part of paraglider to generate lift and bear load. The shape and area of the canopy and the speed of relative movement with the airflow have great influence on the generation of lift. The wing canopy consists of an upper wing surface, a lower wing surface and dozens of irregular ribs regularly distributed along the span direction. The upper wing surface and the lower wing surface are sewn with the rib to form a specific wing shape. The front edge of the canopy is arranged along the transverse direction of the rib to form an air inlet with a certain size. Because the rear edge of the umbrella is completely closed, an air chamber for storing air is formed between the upper and lower wings and the umbrella ribs.
When the canopy moves relative to the air, the air enters the air chamber from the air inlet, but it cannot be exhausted because the rear edge of the canopy is closed. Under the action of air impact force, the inner cavity of the umbrella clothing produces a certain pressure, so that the flexible umbrella clothing maintains a certain rigidity and shape. In order to make the air inlet convenient for air to flow in, the air inlet of each rib is sewn with plastic reinforcing sheets with certain hardness, smoothness and brittleness. In different parts of the wing ribs, there are also round holes with different sizes and numbers. The purpose is to make the air between the air chambers flow in the spanwise direction, which is used to balance the pressure inside the whole umbrella, thus helping to maintain the shape of the whole umbrella and avoiding the collapse of the umbrella due to uneven local stress during inflation.
Umbrella rope
Parachute rope is used to connect the canopy and the sling system, so that the paraglider becomes a whole and maintains the wing shape of the paraglider during flight. At the same time, the parachute rope is also a force transmission component carried by the paraglider, and the pilot can effectively control the paraglider through the parachute rope in flight. Usually, the umbrella ropes are divided into three or four groups from front to back, which are called groups A, B, C and D, and are symmetrically distributed on both sides of the central axis of the umbrella. The upper end of the rope is usually Y-shaped, which is connected with the canopy at the joint between the lower wing and the rib. The lower end is determined by the shape and force of the wing connected with the corresponding control belt through a detachable metal ring, and its length is determined according to the shape and force of the wing connected with the control belt, and its length is determined according to the requirements of control stability and optimal attack angle position.
Bundle assembly
Strap, also known as safety belt or sling, is composed of many parts with different functions, so it is called strap system. Banding system should have good comfort and safety. Harness system is a load-bearing component that fixes the pilot's body and connects with the whole umbrella wing system, and it is also a protective component for the human body. In terms of fixing and connecting functions, it is composed of main belt, shoulder belt, chest belt, waist belt, leg belt, diagonal belt, backup umbrella connecting belt, metal ring buckle and quick release lock, which form a whole around the L-shaped backpack. Most of these belts are made of high-strength brocade with a width of 44 mm and a breaking strength exceeding 1200 kg. In terms of human body protection function, it consists of cushion and cushion, equipped with FRP fender and thick sponge rubber lining. More advanced is the inflatable air cushion, which is installed in the L-shaped backpack interlayer of the shoulder strap system, effectively enhancing the protection function of the human spine, back and pelvis, and preventing the human body from colliding with obstacles or being dragged and injured during take-off and landing.
control system
The control system of paraglider is mainly composed of control belt, control rope and control ring (control rod). High performance paraglider and pedal accelerator. If necessary, a part of the umbrella rope can also be used for manipulation. The whole control system is symmetrically distributed on both sides of the center line of the umbrella. The upper ends of the left and right control belts are Y-shaped, which are connected with the rear edge of the umbrella at multiple points, and the lower ends are connected with the control ring through the limit pulley on the rear control belt. The left turn and right turn of the paraglider can be realized by pulling down the control rope by the lifting ring, and the speed control of the paraglider can be realized by pulling down the control rope. When not in use, the control ring can be fixed with a snap button located on the rear control belt. The root of the control belt of a paraglider is usually divided into two or three at the front, three at the back, and branched upward, and then divided into three or four at the front and rear (through detachable rings respectively), which are connected with each group of parachute ropes in the order of group A, B, C and D. Two pairs of pulleys and acceleration ropes are installed in front of the control belt of a high-performance paraglider to connect with the pedal accelerator. Besides being connected with the umbrella rope, the control belt can also be used for acceleration, deceleration and deceleration. The sole function of pedal accelerator is to increase the speed of gliding parachute when necessary in flight. The lower end of the acceleration device is connected with the pedal metal rod (acceleration rod), and two acceleration control ropes on the rod are connected with the control belt acceleration rope through the pulley in front of the harness system. When the two pedals step down the metal pole, the control belts of Group A and Group B are pulled down step by step, and at the same time, the leading edge of the canopy is pulled down, the angle of attack decreases and the horizontal speed increases.