First of all, no matter what the aircraft, the first consideration is weight loss. The commonly used weight loss material is aluminum. The density of aluminum is about 2.7g/cm3, while the density of carbon fiber composite is only 1.7g/cm3. It’s a very small number, so carbon fiber composites are the best choice for weight reduction, which reduces energy consumption and increases cruising range. Moreover, carbon fiber composite materials have high strength and high rigidity while reducing weight, which is much higher than general structural materials and can resist the strong resistance encountered during flight. The carbon fiber unmanned casing can be used for a long time, reducing unnecessary maintenance, mainly because of the aging resistance of carbon fiber composites.
Carbon fiber not only has the inherent intrinsic properties of carbon materials, but also has the soft processability of textile fibers, and is a new generation of reinforcing fibers. Carbon fiber is a microcrystalline graphite material obtained by carbonizing and graphitizing organic fibers. The carbon fiber has a microstructure similar to that of artificial graphite and is a layered graphite structure. Each carbon fiber is made up of thousands of smaller carbon fibers, about 5 to 8 microns in diameter. The carbon fiber at the atomic level is very similar to graphite, and is composed of a layer of carbon atoms arranged in a hexagonal shape. The difference between the two lies in the connection between layers. Graphite is a crystal structure in which the interlayer bonds are loose, while carbon fibers are not crystalline structures, and interlayer bonding is irregular. This prevents the strength of the slip enhancing material. The density of carbon fiber is generally 1750 kg/m3. The thermal conductivity is high but the power transmission capacity is low, and the specific heat capacity of carbon fiber is also lower than that of copper. When heated, the carbon fibers become thicker and shorter. Although the natural color of carbon fiber is black, it can be dyed in different colors.
There is no cockpit on the drone machine, but equipment such as autopilot and program control devices are installed. Personnel on the ground, on the ship or at the remote control station of the parent machine are equipped with radar, etc., for tracking, positioning, remote control, telemetry and digital transmission. Compared with the manned aircraft, it has the advantages of small size, low cost, convenient use, low requirements for the operational environment, and strong survivability on the battlefield. Since drones are of great significance for future air combat, major military countries around the world are stepping up their development of drones. The application of automation in aircraft driving is another major technological advancement after people fly into the sky. A drone is a non-manned aircraft that is controlled by radio remote control or by its own program. Because he is a concentrated carrier of high-tech technology, it is mainly used in modern warfare. Modern warfare has been an organic cooperation between tanks, artillery, planes, and warships, and a three-dimensional war between the open space and the sea. Its advanced technology, lethality and danger are unprecedented. The drone is characterized by its small size, light weight, good maneuverability, long flight time and easy concealment. Especially because it is unmanned, it is especially suitable for carrying out dangerous tasks, so it is playing in modern warfare. More and more important. For example, in the Battle of the Bekaa Valley in 1982 and the Gulf War that erupted in 1991, drones played an extremely important role in reconnaissance and surveillance, interference with enemy radar communication systems, and guiding their own offensive weapons.