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Radio controlled airplanes are model aircraft that are controlled remotely by a handheld transmitter. These airplanes are typically powered by electric motors or gas engines, and are designed to mimic the flight characteristics of full-sized planes. Enthusiasts use radio controlled airplanes for recreation, competition, and aerial photography. These models come in various sizes and designs, ranging from simple beginner planes to complex scale replicas of real aircraft. The hobby of flying radio controlled airplanes requires skill, patience, and knowledge of aerodynamics and electronics.