Electric coaxial rc helicopters, sometimes referred to as dual-rotor or contra-rotating helicopters, have been responsible for bringing thousands of new people into the hobby of radio control flying in the last few years, and it's easy to see why Co-axial radio remote controlled helicopters are by far the easiest type of rc helicopters to fly in the world! Basically any of these helicopters are capable of hovering on your first few attempts. They are much much easier to master than a conventional helicopter that has a single main rotor and tail rotor, and are equally capable of holding a steady hover. Flying them indoors is a realistic option too, because their stability makes them easy to control within confined spaces.