Aquadcopter or quadrone is a kind of small helicopter with four spinning blades used for recreational sports. The term ӱuadԠcomes from the fact that they have four rotating propellers on each blade. They are generally considered to be suitable for indoor purposes, and have become quite popular in indoor remote controlled flying competitions. Many enthusiasts, especially those who belong to a sports club, use quadcopters for filming races and other events. Remote controlled quadcopters can be flown indoors on a rainy day without risk to the pilot or anyone else nearby. They are ideal for indoor usage because they can fly in places where it would be impossible for a human to fly an aircraft. Indoor quadcopters can also be used outside on hot days, provided that there is no wind. They are used by many drone flying hobbyists. The typical quadcopter has four rotors which are propelled by a pusher system. This type of motor works more quickly than the propeller systems used on helicopters. In fact, they have a very similar effect to a helicopter rotor, which means they can move faster even if they are a bit heavier. And like helicopters, their propane fuel is also much cheaper. Most people who use remote controlled aircraft ( drones in particular) consider quadcopters to be quite easy to fly. They have stable flight characteristics and are very simple to fly. They can be flown by one person easily, and can remain in the air for a long time thanks to their agility. However, there are some drawbacks to these types of aircraft. To start with, they can only be flown by people who have considerable experience in flying RC vehicles, and they are not very aerodynamic. On the other hand, most RC enthusiasts consider quadcopters to be the perfect platform to get started with RC hobby flying. They offer a lot of advantages compared to fixed-wing aircraft and helicopters. For one thing, they are extremely compact and can often be stored away without taking up much space. They can also be flown indoors, although some models are made for outdoor applications. Another advantage of a quadcopter is that it can provide its owner with a sense of real autonomy. Since it is an autonomous UAV (unmanned aerial vehicle), it can still perform all of the usual drone operations, such as monitoring, mapping, locating, and protecting the area above from any potential threats. It can even autonomously search out and locate a crashed uav. If a UAV crashes, then the quadcopter can be programmed to search for survivors, recover bodies, or (if necessary) deliver emergency medical care to the injured. As a result, this type of UAV has become a valuable tool in rescue operations and military operations. One major limitation of the quadcopter as compared to other forms of remotely piloted vehicles is its inability to function as an actual aircraft. As it was noted above, recreational drone use is growing in popularity because of its affordability and portability. As such, hobbyists often experiment with different configurations. As might be expected, some enthusiasts have even managed to construct their own homemade UAVs, although these devices are significantly more complex and often require skilled help. In any case, anyone considering purchasing quadcopter RC aircraft should be sure that he or she has sufficient training before attempting such a complicated project. In addition, although RC hobbyists commonly fly RC drones for fun, serious hobbyists have also been known to practice aggressive maneuvers with their UAVs. This may seem like a good reason to fly a quadcopter: if you crash one, it will not kill you! The reality, however, is that most RC hobbyists are probably going to crash at least one UAV. When this happens, the device is usually badly damaged. While there are no worries about dying from crashing a quadcopter, the chances of such an accident is likely to cause some scarring to an RC modelҳ body.