Control Surface Alignment
1. Power on and bind the transmitter with the receiver.
2. Ensure that the transmitter throttle and all trim switches
are in the zero position.
3. From a top-down view, make sure the rudder is aligned
with the vertical tail n. If adjustment is needed, rotate
the ball link on the linkage to change the length between
the servo arm and the control horn for adjustment.
4. Align the trailing edge of the aileron with the trailing edge
of the wing. Adjust the pushrod as needed.
5. The Stabilator should have a slight up elevator when
centered. In the neutral position, the leading edge of the
Stabilator should align 2mm below the panel line in the
fuselage, as shown in the diagram on the right.
Trouble shooting
SU-27
Neutral position of Stabilator
2mm
Problems Probable Causes Solutions
Aircraft will not respond to
the throttle but responds
to other controls.
• ESC is not armed.
• Throttle channel is reversed.
• Lower throttle stick and throttle trim to
lowest settings.
• Reverse throttle channel on transmitter.
EDF noisy or vibrating
excessively.
• Damage or malfunction of spin-
ner, blades, motor, etc.
• Loose motor mount or EDF
installation.
• EDF has high-speed rotating compo-
nents. Damage or malfunction can cause
imbalance. It is not recommended for
users to repair themselves; Factory repair
is recommended.
• Tighten screws and secure motor mount
and EDFs.
Reduced Flight time or
aircraft underpowered.
• Battery not fully charged
• Low discharge rate
• Battery malfunction
• Completely recharge battery.
• Replace with high discharge battery.
• Replace battery.
Control surface does not
move, or is slow to re-
spond to control inputs.
• Control surface, control horn,
linkage or servo damage.
• Wire damaged or connections
loose.
• Replace or repair damaged parts and
adjust controls.
• Do a check of connections for loose
wiring.
Controls reversed. • Channels are reversed in the
transmitter.
• Do the control direction test and adjust
controls for aircraft and transmitter.
Sudden power reduction
during Flight
• ESC enters low-voltage protec-
tion mode.
• Motor or battery malfunction.
• ESC enters overheat protection
mode.
• Immediately land and check battery
voltage.
• Check components such as battery,
transmitter, receiver, ESC, motor for faults
• If the ESC temperature is too high due
to high environment temperature or
prolonged continuous Flight, allow it to
cool down.
Receiver LED blinking
slowly • Power loss to receiver.
• Check connection from ESC to receiver.
• Check servos for damage.
• Check linkages for binding.
9
Neutral position of Aileron and Rudder
