E/
R/A2
SYS
AIL1
MODE
AIL2
RUD
AIL1
ELE
FC120
3-axis Flight Control
AIL
ELE RUD
N
R N
R N
R
- 10 -
- 9 -
NOTE:
You may need to reverse mode channel for
correct switch operation.
!
How to setup gains and correction directions?
There are 3 pots to adjust the correction directions and gains for
aileron (roll), elevator (pitch) and rudder (yaw) channel. Please
see the sketch below.
AIL/ELE/RUD
High
High
Low
OFF
NOR GAIN
Low
REV GAIN
● It needs a few testing fly to determine appropriate gains, we
recommend starting from conservative gains (low) first
Ground Test
● Please do a ground test before first flight.
● Test if the mode switch is working properly. Do not turn on the
motor/engine, toggle the mode switch on the transmitter to high
position, LED2 will turn GREEN for 0.5sec, now FC120 is in
Aerobatic mode.
● Test gyro correction direction. Rotate the model on each axis,
corresponding control surface should act to against that rotation.
If the action is wrong, please reverse the pot of that axis.
L2
High
Green(0.5S)
● Fly in aerobatic mode at safety altitude, accelerate the
airplane to its maximum speed to see if there is oscillation in
pitch, roll or yaw axis. oscillation indicates the gain is too high,
please slow down the airplane, decreasing the gain after landing
● Please don’t adjust the gain too much one time, it’s
recommend adjusting 5-10 degrees one time
Roll & Aileron Movement