Hello,

I am brand new to RC helis, having just purchased a Blade CX2. I am having a great time with it so far. I have a question about the swashplate. I was expecting to see that the elevator servo for forward/rear flight would hook to the back of the swashplate, and that the aileron servo for left/right flight would hook 90 degrees off of that on the side of the swashplate. I was surprised to find them separated by only about 45 degrees and in similar but opposite positions on the rear/sides of the swashplate. How does it work like this? It seems that the elevator and aileron controls produce the same type of swashplate movements and that they would result in diagonal flights. Am I missing something?

Thanks, Dan

The servos are syncronized for foward and backward flight and opposite each other for roll the dual rotor/motor setup controls the yaw. one motor slows or speeds up to swing the nose. So to fly foward both servos push the swashplate foward and both to reverse and opposite to roll. It's a pretty neat simple setup

Are you sure? That doesn't seem to be the case on my CX.

I've noticed the same thing that dankirk is talking about. When I push forward on the cyclic, the swash plate moves forward and to the left, having been actuated only by a single servo. The helicopter, on the other hand, moves straight forward. There seems to be no mixing going on of any kind. The only way I can get both servos to move at the same time is with diagonal cyclic inputs.

I've never been able to figure out exactly why, except that it has something to do with the fact that it's a coaxial setup.

the offset angle on the swash compensates for the torque of the coaxial setup...

If you pushed swash staright forward it would go forward and at an angle...

I thought it probably had something to do with that...

Thanks for the clarification.

Also bear in mind that the rotor disc(S) is like a gyroscope--it won't respond in the direction you push it, but at some angle from there. On most CP helicopters with a flybar, the swashplate flys the flybar, and the flybar's input to the rotor disk is 90 degrees away from where you might expect it to be.
Also in the CX/CX2 the transmitter mixes the inputs to the two servos to give the correct swash motion depending on what the pilot is telling the helicopter to do.
As long as it flies in the direction you are pointing it, don't worry.

Mine flies in the direction it's pointed. Unfortunatly, that's not always the direction I THINK it's pointed. [:@]

I finally figured out that I have to point it in the direction it's flying...I guess that's what that left stick must be for.