5
Model Selection
Gyro Gain Adjustment
3-Switch Setting
100%
0%
The HG3XA uses a 3-bit jumper (J 1-2-3) for model type
selection. Adapt the adjustments J1, J2, and J3 as specified in
the table according to your type of aircraft. “0” signifies open
and “1” denotes closed for the selected aircraft.
Model type
Jumper setting
Servo connection
J1
J2
J3
OUT-1
OUT-2
OUT-3
Gyro off
0
0
0
-
-
-
Standard aircraft
0
0
1
Aileron servo
Elevator servo
Rudder servo
Delta wing or flying wing
0
1
0
Left wing servo
Right wing servo
Rudder servo
Aircraft with a V-tail
1
0
0
Aileron servo
Left tail servo
Right tail servo
The HG3XA provides three trimming potentiometers to adjust
the gyro gain of the aileron, the elevator, and the rudder
separately. Use a small flathead screwdriver to complete these
changes.
Increase the gyro gain by turning the potentiometer clockwise.
Decrease the gyro gain by turning the potentiometer
counterclockwise. The ideal volume setting is determined by
several factors, including the size of the fuselage, the weight
of your model, or even the power allocation used and the size
of the rudder surfaces.
We strongly suggest adjusting the gain to a lower volume
for the initial flight. The adjustment is immediately active –
without the need to restart. Finely adjust the potentiometer for
subsequent flights as desired.
When making adjustments, always disassemble the
propeller or disconnect the drive motors from the flight
control system.
!
Define a 3-way switch at your transmitter. The channel for
the 3-way switch from the receiver is connected to pin 1:
flight mode changeover switch “IN.” Use this 3-way switch to
change the flight mode while the aircraft is airborne. Refer to your
transmitter manual for assigning a gyro to a 3-position switch.
If the “Channel Switch” slot has not been assigned, the default
Standard mode will engage. This is not recommended, as it
is then impossible to switch off the gyro and any malfunction
might cause your model to crash- particularly if the gyro in the
model moves from its defined position.
When using a 2-way switch, you can toggle between
two of the three available modes. These modes differ
according to the type of transmitter.
i
When operating the HG3XA, the current flight mode is
indicated by illuminated LEDs:
· Standard Mode: Blue LED illuminated
· Heading Hold Mode: Red LED illuminated
· Gyro Off (system deactivated): No LED illuminated
Servo Middle Adjustment, Neutral Rudder Position
Center all the rudders by adjusting the length of the ball
linkage rod or setting it correctly using the trim keys (or sub-
trim) of the transmitter. You will need to re-adjust the middle
position of the gyro system. Toggle the 3-way switch twice
for one second between Standard and Heading Hold modes.
