Futaba 9CPS - Manual (Page 65)

GYA gyro mixing
Adjustability:
65
GYA series gyros are a high performance, compact, and light weight AVCS gyro developed for model airplane. Integrated
sensor and control circuit make it easy to mount.
GYA350: for airplane aileron, elevator, or rudder.
GYA351: for airplane ailerons, especially two servos such as when using FLAPERON.
GYA352: for airplane aileron, elevator, or rudder control. Two of these surfaces (axis) can be controlled by GYA352.
The GYA gyros have two operations modes: AVCS mode and Normal mode.
Normal mode:
This mode performs general proportional control operation. For instance, it controls the gyro so that changes are countered
when the attitude of the aircraft is changed by cross-wind, etc.
AVCS mode:
This mode performs both proportional and integrated control operation. The difference between Normal mode and AVCS
mode operation is that where as the Normal mode only counters changes in attitude, the AVCS mode returns to the original
controlled variable simultaneously with countering changes in attitude. For example, during knife edge flying, aileron and
elevator meeting rudder is normally necessary, but in the AVCS mode, meeting rudder is performed automatically by the
gyro.
GYA series gyros:
GYA series gyro operation modes:
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Plug the gyro's sensitivity adjustment to channel 5, 7, or 8 of the receiver. (selectable)
Full switch assignability
Each rate setting may be set from 0 to NOR100% or AVC100% gain.
NOR: Normal mode gain AVC: AVCS mode gain
Larger percentages indicate more gain, or gyro responsiveness.
GOAL of EXAMPLE: STEPS: INPUTS:
Open and activate the GYRO function.
Optional: change switch assignment.
Ex: select E .
Close the function.
for 1 second.
(If basic, again.)
to GYRO.
to SW.
to
Set up a GYA gyro setting.
Adjust gyro rates as needed. (Ex:UP
to NOR70%, CNTR to 0% (off), DOWN
to AVC70% as starting points.)
E.
to NOR70%.
(0%).
to AVC70%.
Gyro gain adjustment:
When the servo hunts, the gyro gain is too high. Lower the gain until the hunting stops.
The gyro will display best performance at a gain just before hunting occurs. Perform adjusting by flying the aircraft
repeatedly.
Precautions:
When taking off and landing, always switch to the Normal mode. Taking off and landing in the AVCS mode is
dangerous.
We recommend that you use the rudder control gyro in the Normal mode. In the AVCS mode, rudder operation is
necessary when turning because the weathervane effect is lost. Use the gyro in the Normal mode unless you are an
expert in rudder operation.
And we recommend that you also set to off (0%) mode for safety as follows.