They dont look exactly like training wheels, but training landing gear parts can provide the same extra stability for a beginner pilot of radio control helicopters. Though this landing gear doesnt have any effect on the flight of the helicopter, it can be a true equipment saver when you are learning to land.

So what is this gyro thing mentioned when discussing the number of channels you need? Remember in school physics when they taught you that for every action there is an equal and opposite reaction?

When the main rotors on radio control helicopters spin, the body of the helicopter wants to spin with just as much force in the opposite direction. The tail rotor provides the necessary force to keep the body of the helicopter facing in the direction you want. Wind and other factors will also try to spin your helicopter, making constant adjustments necessary on the speed of the tail rotor.

What a gyro does is takes these extra forces into account to control the tail rotor adjustments for you. Most pilots of radio control helicopters wouldnt hit the skies without their gyro.