A co-axial helicopter's two main rotors turn in opposite directions. (see arrows) There is no functional tail rotor, although some models, like the V3 Lama shown here, have a small rotor in the tail for scale-like appearance. Each set of main blades cancels the torque from the other set, so the helicopter is ultra-stable. Its forgiving flight characteristics give new RC pilots a break while they figure out the controls.
Co-axial heli's are in their element flying indoors. You can do intricate and precise flying when you get used to the controls. They are not recommended for flying outdoors because even mild winds can carry them away. Some RC pilots do fly them outside in calm conditions. We also occasionally crash them, and sometimes lose them to the wind. (Some RC pilots like to take risks....)
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Blade CX |
V3 Lama |
The most popular co-axial helicopters are the Blade CX and CX2, by E-flite and the Lama, by E-sky. After flying both I think the Lama handles better. It also costs less. Other co-axial heli's are by Colco and Walkera.
Co-axial helicopter flying indoors. |