Man’s unending desire to fly was fulfilled on December 17, 1903 by the Wright brothers Wilbur and Orville. Since then flying became an obsession of people of all ages. While young men wanted to become pilots the children wanted to fly toy planes. The peak of this desire is the radio controlled helicopter and the remote control plane. Though the Wright brothers were able to produce the first flying machine in 1903 It took longer to produce the remote control flying machine. We had to wait until the remote control technology was able to control a remote controlled flyer. The present day remote controlled helicopters use radio technology to control the helicopter on flight. They are popularly known as RC helicopter. There are some small helicopters which use infra red technology but it is the radio technology that is widely used in the present day remote controlled helicopters. The RC helicopter runs with an ethanol powered engine or an electric motor. With the recent improvements to the rechargeable batteries and the reduction of the prices the electric RC helicopter are more popular. RC helicopters are a popular among model air craft enthusiasts who conduct shows and competitions among themselves. To fly a RC helicopter one should get special training. Unlike a model air craft which is flying straight the helicopters need different kinds of maneuvers which an amateur cannot do with out careful training. These helicopters carry out the different maneuvers by changing the speed of the rotor and the tail rotor. Some model helicopters have sensors to detect the wind speeds which detect the wind speeds and adjust the speed of the rotor and the tail rotor to have the model helicopter flying steadily. RC helicopters are normally available in kits which the buyer has to bring home and assemble. To assemble one it could take from 5 to 20 hours depending on the model. The construction is mainly out of aluminum, plastic or fiber. The blades are normally made out of wood or fiber glass. Apart from being a hobby the RC helicopter using electric power is use as UAV or unmanned aerial vehicles as spying devices.
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