Micro coaxial helis have the most stable design of all RC helicopters. This stability makes them easy to fly, and the skills learned on micro coaxials can transfer easily to larger coaxial helicopters, and even single rotor helis. The coaxial concept increases flying stability because unlike a single rotor helicopter, coaxial rotors are stacked on top of each other and spin in opposite directions, thus counteracting reactive torque. A separate motor controls respective rotor movement.
These two motors are able to control lift by speeding up and slowing down simultaneously. They can also control turning with this torque adjustment just as the tail rotor does on a single rotor helicopter.
Despite their small size, these micro helis are not toys. They have all the functions and agility of the full-size single rotor counterparts. On micro coaxials, cyclic control is handled by a plate on the bottom rotor, allowing for the agility in dips and swoops.
E-Flite’s Blade CX2 and Blade CX3 are popular micro coaxial models. An added convenience is that they come ready to fly right out of the box. Due to their size and stability, they are even suitable for indoor use.
With such great stability due to their coaxial blades, these micro helis are an ideal choice for beginners entering the hobby. Any hobbyist can benefit from the understanding of how these tiny models work, and knowledge of rotor concept and theory is a step toward improved flying skills.
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