STABILIZER QUICK-START GUIDE
It seems as if it’s human nature to ignore instruction manuals, but setting up a gyro requires careful reading and understanding of the manual. Specific steps must be followed to the letter to program them properly, and they vary by manufacturer. Some gyros have provisions for using a programming card or computer interface for easier setup. Below are some universal steps for gyros.
AIRCRAFT SETUP. Proper plane setup is even more important when using a gyro. Mechanically set up the control throws and directions using the best practices; place the clevis farthest out on the control horn and closest in on the servo arm that gives the desired control throw. Some gyros do not tolerate any subtrim, but it is best to keep it to a minimum in any case.
EXPONENTIAL. Since the gyro is attempting to counteract movement about the aircraft’s axis, it behaves somewhat like expo. To get the same feel, the expo may need to be reduced. Flight testing will be required to determine the best setting for your flying style.
SERVOS. The servos will be working constantly, which demands a lot from them. Gyros are the most efficient when coupled with high-speed servos of adequate torque. Digital servos are ideal (some manufacturers require them), while a servo that is too slow can render the gyro unusable. Use the best servos you can afford to achieve the best performance from your gyro.
GYRO MOUNTING. Mount the gyro on the aircraft centerline as close to the center of gravity as possible. Use the supplied double-sided tape (usually shock-absorbing) to mount it to a firm, solid surface, paying attention to the gyro’s orientation. Excess vibration can cause gyro inefficiency, forcing you to reduce the gain. If using a nitro or gasoline engine, verify that the gyro can be used as some are designed for electric aircraft only.
GYRO OPERATION. Verify that the gyro direction is correct. A simple way to do this is to tilt or raise the aircraft along an axis and check that the control surface moves in the same direction. To check the roll axis, raise the right wing panel quickly; the right aileron should move up. For the pitch axis, raising the tail should move the elevator up. Moving the tail to the right should result in the rudder moving to the right. Check all the control surfaces in both directions, and change the gyro direction as needed.