Glider Aircraft is an aircraft without an engine that relies on aerodynamic principles to fly. It can glide in the air for a long time through the interaction of the lift of the wing and the air flow, and can even use airflow to fly long distances. Glider aircraft are not only used for entertainment and sports, but also play an important role in flight training, meteorological detection and scientific research.

◆ Basic Characteristics

The biggest feature of a glider aircraft is that it has no engine. Therefore, its flight relies entirely on air flow and wing design to generate lift. Its flight performance mainly depends on the following aspects:
Wing design: The wing design of a glider aircraft is very important, and usually adopts a long wingspan and narrow wing design to reduce air resistance and maximize lift. The wing design is usually a streamlined type with extremely high aerodynamic efficiency.
Lightweight structure: The structure of a glider aircraft is very light, usually using materials such as aluminum alloy and carbon fiber, which not only ensures strength but also reduces the weight of the aircraft. This enables it to maintain a long flight time without an engine.
High lift-to-drag ratio: The design of hang gliders focuses on improving the lift-to-drag ratio, which determines the efficiency of the aircraft in the air. A high lift-to-drag ratio means that the aircraft can obtain more lift with less air resistance, and the flight time and distance are greatly extended.
Smooth flight: Hang gliders have extremely high flight stability, and flyers can glide continuously in the air, and even use rising air currents to increase altitude and achieve long-term flight.

◆ Working Principle

The basic principle of hang glider flight is similar to that of hang gliders, relying on the interaction between lift and gravity in aerodynamics. During flight, the relative movement between the aircraft's wings and the air flow generates lift, which enables the aircraft to stay in the air. In short, the process of hang glider flight includes:
Lift generation: The wings of hang gliders use the differential speed of relative air flow (that is, the air flow speed above the wing is greater than the air flow below the wing) to generate lift. This is achieved based on the Bernoulli principle and the principles of fluid dynamics.
Flying with updrafts: Gliders often seek out updrafts (such as thermals, hillside drafts, etc.) to increase their altitude. Pilots can use updrafts to glide continuously in the air, and even fly higher by interacting with the airflow.
Gliding and Control: Gliders control the direction and altitude of their flight by adjusting their flight attitude. For example, by adjusting the angle of the wing, the pilot can change the lift and drag of the aircraft, thereby controlling the aircraft's flight trajectory.

◆ Types

Gliders can be divided into several types according to their purpose, flight performance, and design:
Recreational Gliders: These aircraft are usually used for leisure flying or sports, and are designed with a focus on controllability and comfort, suitable for beginners and amateur flying enthusiasts. They have a small fuselage, short wings, and moderate flight speeds and flight times.
Racing Gliders: These gliders are designed with a greater focus on flight speed and efficiency. They usually have longer wings and a high lift-to-drag ratio, which allows them to achieve better results in competitions. Racing hang gliders are usually equipped with tools such as altimeters, speedometers, and navigation systems to help pilots optimize their flight paths.
Training hang gliders: Hang gliders are widely used for pilot training. Training hang gliders are usually stable and safe, suitable for pilots to learn flying skills and basic knowledge. During the training process, pilots can learn how to use air currents to control flight, fly for long periods of time, and perform various flight maneuvers.
Powered hang gliders: While hang gliders do not have engines, powered hang gliders are equipped with small engines. The engine can be used to provide additional thrust when there is no updraft, helping the aircraft to take off, fly for long periods of time, or cover large distances. Powered hang gliders combine the advantages of hang gliders and powered aircraft, providing greater flexibility.

◆ FAQ

How to maintain a drone?
Maintaining a drone requires regular inspection and care. First, make sure the battery stays charged and avoid overcharging or discharging. Clean the fuselage, propellers, and camera regularly to remove dust and debris. Check the propellers for cracks or damage and replace them in time. Calibrate the gyroscope and GPS before flight to ensure stability. After flight, check the battery, motor, and control system to confirm that there are no abnormalities. Update the firmware regularly to ensure the latest performance of the device. In addition, avoid flying in adverse weather conditions to extend the life of the drone.

What is the safe operation guide for Drone?
First, make sure you are familiar with local laws and regulations before flying, and avoid flying in no-fly zones. Maintain line of sight during flight to avoid loss of control or signal. Check the status of components such as batteries, motors, propellers, etc. to ensure that the equipment is in good condition. Avoid strong winds, heavy rain or thunderstorms during flight to ensure stable flight. Comply with flight altitude restrictions to avoid collisions with buildings or people. Calibrate GPS and gyroscopes regularly to ensure accurate navigation. Finally, shut down the drone in time and store it properly after the flight.

How to extend the life of drone batteries?
The key to extending the life of drone batteries is to avoid overcharging and over-discharging. Before each charge, make sure the battery is between 20%-80% and do not wait until the battery is completely exhausted. Use the original charger and avoid using non-compliant charging equipment. Avoid flying in extreme temperatures, especially in overheated or cold environments, as high temperatures will accelerate battery aging. Use the battery regularly and avoid leaving it for too long when not in use. Charge it promptly after the flight to avoid the battery being in a low power state for a long time.

◆ Industry Applications

◆ Company Profile

Jiangsu Legend Intelligent Technology Co., Ltd. is a professional UAV industry application solution service provider. Relying on a complete service system and a good cooperation mechanism, it has become a deep partner of DJI industry applications.
Based on DJI industry application series products and relying on the East China UAV base, we build an ecosystem and six centers to provide customers with multi-dimensional and all-round solutions from top-level design to landing services. Help the fields of public security fire protection, power inspection, surveying and mapping infrastructure, urban management, etc., liberate productivity, reshape productivity, and build a link between technology and services.
Since its establishment, Jiangsu Legend Intelligent Technology Co., Ltd. has obtained various qualification certificates in the industry, and has become an industry leader through continuous in-depth exploration and exploration of the UAV field. It has established long-term strategic cooperation relationships with government and enterprise units such as Nantong Rudong Environmental Protection Bureau, Nantong Rugao Environmental Protection Bureau, Yancheng Funing State Grid, and Shandong Linyi Urban Management Center. It has continued to grow in solving practical problems, and gradually formed a win-win concept with cutting-edge technology as a technical means and personalized customization as a service purpose, to help the healthy and sustainable development of society. In the future, the company will continue to invest in research and development to increase its comprehensive competitiveness and actively deploy high-tech enterprises.