What is the Meaning & Definition of model airplanes

The airplane is a sport that involves small aircraft construction and subsequent practice of them. Derives from the construction and flying of airplanes of small sizes and flying without a crew on board. Now, inside the airplane are distinguished precisely two sheds, a scientist, has to do with the design and construction of aircraft and then requiring specific expertise in aerodynamics and mechanics.
Meanwhile, the other branch, the sport involves the practice of flight of small ships, which includes various ways depending on the model.
Anyway, it is important to note that both branches always must go hand in hand in the airplane because it is necessary to have the scientific knowledge to practice flying in these aircraft.
Among the varieties of model aircraft we find the following: free flight (it's purely towed models, or are thrown hand either with rubber or explosion, motor planning without the intervention of its creator), circular flight (are characterized by having a set of cables that allows control from the pilot, rotating the model around this) , radio control (is the most popular category within the practice, which involves models or semi models, which operate through radio signals that emit orders to a few devices that are found on the surfaces of control models in question), Interior (these models are characterized by being exclusively designed to fly indoors), FPV or First Person View (it is the most modern variant of model airplanes that consists of the pilot Guide to the) aircraft from a wireless video).
And by the flight system that can be classified in: gliders (characterized by the arrangement of wings), rubber, CO2 engine and electric motors, internal combustion and turbine engine, pulsejet engine engine.