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Setting Up the Landing Gear
Using a 2-position RC transmitter switch, landing gear retraction can be carried out remotely.
Setting up the transmitter
Select a 2-position switch (default setting is OK) as the control input for the landing gear. Ensure the
corresponding receiver port is connected to the “IN” port on control board. For the A2 flight control
system, connect the flight controller’s F1 port to “IN” port on control board.
Upper: Toggle the switch to this position to raise the landing gear.
Lower: Toggle the switch to this position to lower the landing gear.
If the transmitter switch has a FailSafe function, set the FailSafe value to the [Lower] position. This
ensures that the landing gear will lower automatically when the receiver enters FailSafe mode.
To avoid accidental switch triggering, slide levers or other controls can be used for landing gear
control.
Usage procedures
1. Ensure transmitter and receiver batteries are fully charged.
2. Toggle the switch to the [Lower] position, and then turn on the transmitter.
3. Ensure the “R”, “L” and “IN” connections are correct.
4. Ensure the landing gear is in the [Lower] position, then power on the system. If a solid green LED on the
landing gear control board lights up, everything is normal. If it flashes green slowly, re-calibrate the system
according to instructions in “Recalibrating Servo Travel”.
5. Toggle the switch to the [Upper] position ONLY AFTER takeoff.
6. Toggle the switch to the [Lower] position for landing.
Setting Up the Landing Gear
