| I will be discussing the most popular drone which is the Multi Rotor drone. These drones are mainly for starters because of their affordable price as well as little to no expertise needed to control the device itself. The drone’s purpose is mostly used for photographers so they can capture videos and images out of their reach. However, they are only able to fly for about 20-30 minutes at a time. The short airtime is mainly because the energy powers 4 rotors. The more rotors you have, the more energy is used. Drones with multiple rotors can only use electric motors because of their swift change in direction and height. Gas cannot accommodate this flexibility in the drones. Some drones even have obstacle avoidance and follow modes in their software.They use sensors to avoid obstacles and use algorithms in their software/SLAM technology as well as turn pictures into 3D maps allowing the drone to sense and avoid objects around them. Drones nowadays have GNSS (a.k.a. global navigation satellite systems) which have two main components: a GPS and GLONASS. These navigation systems are also equipped with a “home base” which is essentially a location picked by the user so that the drone may safely land upon completion. There are usually three different types of technology used for the drones to return home. The first one is triggered by the pilot manually clicking on a phone or remote for the drone to return to home base. Second is if the drone reaches lowery battery, for example has 10% remaining it will come home automatically. There is even technology where depending on how far your drone is, the low battery will initiate based on that. For example, if the drone is half a mile out, its low battery will initiate at a higher battery percentage than if the drone was 100 yards away. The final type of technology is if somehow the navigation software has lost contact with the remote it will automatically fly back to home base.
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