RC-CAM
Senior Heliman
Location: USA
| If installed on the rudder (yaw axis), the gyro will mount just like on a R/C heli. Pretend that someone drove a ten inch spike straight down into the airplane's canopy -- call that the "shaft." Then follow the gyro instructions.
If you wish to tame roll (ailerons) or fore/aft pitch (elevator) then the gyro's mounting axis is totally different. You will know you made the correct mounting choice when the servo arm travels the most distance when you invoke a sudden change to the intended axis.
For example, if ailerons are the control that will be damped, just jerk the model to simulate a sudden roll and you should see an opposite response on the aileron's control surface. This is done while on the workbench. 
Don't forget that gyro direction is important too. You want it to resist, not assist. Otherwise you will corkscrew into the dust. Happens all the time to first time heli builders (a diaper changing sort of experience).
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