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The idea of using unmanned entities to wage aerial war isn’t new. In the early days of the USA’s involvement in World War 2, President Franklin D. Roosevelt approved research into a plan to release bomb-wielding Bats from jets.
The bombs — small kerosene-filled incendiary tubes that operated on a chemical time-release fuse — were connected to a surgical clip with a short piece of string, and the clip was attached to a bat’s chest. The idea was to cool the bats down into a state of forced hibernation, initiate the chemical fuse, attach the device, load the placid bats onto a plane and then release them over a target area. Ideally, the bats would seek shelter in buildings, chew through the string (separating themselves from the devices) and then the device would detonate, setting enemy infrastructure on fire.
though the experiment was a failure but The experiments did give researchers insight into possible problems that UAVs may cause or encounter.
An unmanned aerial vehicle (UAV), also known as a remotely piloted aircraft (RPA) or unmanned aircraft system (UAS), is a machine which functions either by the remote control of a navigator or pilot (called a Combat Systems Officer on UCAVs) or autonomously, that is, as a self-directing entity.
There are a wide variety of UAV shapes, sizes, configurations, and characteristics. Historically, UAVs were simple drones (remotely piloted aircraft), but autonomous control is increasingly being employed in UAVs. UAVs come in two varieties: some are controlled from a remote location (which may even be many thousands kilometers away, on another continent), and others fly autonomously based on pre-programmed flight plans using more complex dynamic automation systems.
Many countries are now producing UAV’s or drones among them USA, Germany, Israel, France, China, Pakistan, Turkey, UK, Russia, Canada and Australia are the largest producers.
Other then these countries, many other have drone technology and they using it efficiently.
Currently, military UAVs perform reconnaissance as well as attack missions. While many successful drone attacks on militants have been reported, they have a reputation of being prone to collateral damage and/or erroneous targeting, as with many other weapon types.UAVs are also used in a small but growing number of civil applications, such as firefighting or nonmilitary security work, such as surveillance of pipelines. UAVs are often preferred for missions that are too “dull, dirty, or dangerous” for manned aircraft.