Hey, guys and gals.

I would like to ask the reasons, advantages and disadvantages of mounting a gyro in connection with tail servo and rudder connection of ESC respectively. Also, why a gyro cannot be connected to main rotor. I wish somebody could help me.

Thanks a lot!

a gyro is there to offset the yaw or hold the tail from spinning as you wind up the engine (main rotor)therefore it has to control the servo that adjusts the pitch on the tail rotor, if you have a fixed pitch on the tail rotor the it would control spend of the motor .
I think this answers your question??it is a little confusing.

Most gyros can only monitor one plane at a time. They have to be mounted on that plane, and connected to whatever controls that plane, for it to work. Usually, gyros monitor the yaw plane, which is perpendicular to the main shaft on helis. Whenever the tail or the main rotor twists the heli, the gyro on the yaw plane detects it, and depending on what kind it is, and its settings, cancels that movement.

If you wanted gyros to control the main rotor you would need to have them mounted in a way which would detect those movements. IE, you would need a gyro on the aileron plane to control the left and right tilting. You would need one on the elevator plane to control the forward and back tilting.

If these planes are confusing, think of them as X Y and Z. Z is yaw, X is aileron, Y is elevator. To mount something on the Z plane you just put it down on the heli like normal (radio tray). To get something on the Y plane you would mount the gyro on either side of the main chassis (as long as its parallel to the main shaft, with the gyro vertical. To get it on the X plane you would need a flat surface on the front or back of the chassis thats parallel to the main shaft... I doubt most helis have such a spot, so you would need to make one.

There is a device called the co-pilot which is both those gyros combined already... If you want a heli that flies itself, thats what to get.