The 4 channel Blade CX electric rc helicopter from E-flite is another contra-rotating model that's based on it's single rotor cousin, the now discontinued Blade CP, which has already proved itself to be a very popular choice as an electric heli for both first-time pilots and advanced 3D flyers alike.

The Blade CX is set to be equally as popular; in my opinion it's one of the nicest looking co-axial radio control helicopters available and has very smooth and stable flight characteristics, making it a perfect model helicopter if you've never had any experience with helicopters before.
Contra-rotating coaxial helicopters like the Blade CX make learning to fly rc helis quite a bit easier than the conventional tail rotor helicopters, because there is one less channel to worry about.
The two main rotors spin in opposite directions to each other thus cancelling out the forces of torque that a single spinning rotor generates. Without that torque, the helicopter fuselage doesn't have the tendency to spin round, so a tail rotor isn't needed.
The Blade CX is an RTF model, that means it comes with everything installed and set up. All you need to do is supply the radio control batteries, and away you go.
Twin 180 size motors connected to a lithium-polymer battery pack give this heli plenty of lifting power and flight times of 10 - 15 minutes.
The small size of this helicopter makes it perfect for flying indoors as with most other mini electric rc helicopters. (You can see the Blade CX in action here - give the video a few minutes to load...)
Other features and specs include:
The Blade CX electric rc helicopter is available from Red Rocket Hobby Shop.