The drone is a general term for Unmanned Aerial Vehicles (UAV). whereas the entire system that allows a drone to function is an Unmanned Aerial System (UAS). The classification of the Northern Treaty Organization mentions that UAS, which weigh less than 2 kg, are called micro-drones, and those that do not exceed 25 kg are called mini drones.
Drone activity is accelerating all over the world. According to the Federal Aviation Administration (FAA) projections, the fleet of small UAS to triple, from 1.1 million units in 2016 to 3.5 million vehicles in 2021.
Single Rotor Drones
Single rotor drones look exactly like tiny helicopters and can be gas or electric-powered. The single blade and ability to run on gas help its stability and fly for longer distances. These UAVs are usually used to transport heavier objects, including LIDAR systems, that can be used to survey land, research storms, and map erosion caused by global warming.
Multi-rotor drones are usually some of the smallest and lightest drones on the market. They have limited distance, speed, and height, but make the perfect flying vehicle for enthusiasts and aerial photographers. These drones can usually spend 20-30 minutes in the air carrying a lightweight payload, such as a camera.
Fixed Wing Drones
Fixed-wing drones look like normal airplanes, where the wings provide the lift instead of rotors- making them very efficient. These drones usually use fuel instead of electricity, allowing them to glide in the air for more than 16 hours. Since these drones are usually much larger, and because of their design, they need to take off and land on runways just as airplanes do. Fixed-wing UAVs are used by the military to carry out strikes, by scientists to carry large amounts of equipment, and even by nonprofits to deliver food and other goods to areas that are hard to reach.