Model Radio Control Helicopters come in all shapes and sizes, both
sport and scale. Most people start with a '30' size helicopter, the '30' referring
 to the engine size, (0.30 cubic inches). The larger '60' size helicopters along
with the scale  models are suited to the accomplished pilot, mainly because
 of their higher prices and rebuild times. To get the best from your model, you
 will need a five-channel radio, and a gyro. The controls you need are throttle,
pitch, tail control, forward and back cyclic, and right and left cyclic.
The gyro helps to stabilise the tail rotor and generally stops
 the helicopter "weather-cocking" around.