Originally Posted by Hayabusa Heli
The photos in that link make it look like it has a vertical tail motor. 4-ch coaxial helis don't have an active tail motor. Maybe it's just a fake motor/prop on there to make it look like a 3-ch heli.
The JXD 340 sliding swashplate only allows for left and right movement. The tail motor is still needed for forward/reverse movement.
You can see the tail rotor spinning