Feiyue FY31AP Installation & Operation Manual - page 19
Guilin Feiyu Electronic Technology Co., Ltd
Guilin Feiyu Electronic Technology Co., Ltd http://www.feiyudz.cn E-mail:
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Recording Neutral Value on the Ground
Step 1: Set up your aircraft and ensure correct FY31AP orientation,
position & leveling. Ensure the Mode 3 (auto stabilization) Elevator,
Aileron and Rudder movements are in the correct direction.
Step 2: Move Dip Switch No. 4 to ‘ON’ position.
Step 3: Place your aircraft on a table. Arrange the aircraft so that is perfectly level. Position the
aircraft exactly as you wish it to be during auto stabilization flight (i.e. fuselage and wings
perfectly level).
Step 4: ON your transmitter and zero all your trims. Power up the FY31AP in Mode 1 (Manual
Mode). Confirm there are no deflection to the Aileron, Elevator and Rudder surfaces by
adjusting your servo links. Re-confirm that your aircraft is perfectly level. This is your aircraft
Neutral position.
Step 5: While in Step 4 leveled position, activate Mode 3 (Auto Stabilization Mode) for at least
2 seconds. Since Dip Switch No. 4 is ON, the FY31AP will now record the Neutral Point.
Step 6: After 2 seconds, move Dip Switch No. 4 back to OFF position.
The procedure is complete and the system is ready for flight.
Note: when the DIP Swith NO.4 is in the ON position,the FY-31AP will
record the neutral point for each time you switch the mode from Mode 1:
Deactivated Mode to
Mode 2: Stabilized mode.
25. Checking the control surface & LED before fly
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Before your fly please reconfirm correct control surface movement direction both in RC control
mode(Mode 1) and Stabilized mode(Mode2).
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Switch the SW1 and SW2, to observe if the blue LED flash in the correct way in each mode.
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Observe the Red LED to confirm if the GPS have locked, if yes, then you can take off your plane.
26. Stabilized mode (Mode2)Test And Sensitivity Adjustment
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At this stage, your aircraft should already have automated surface control with the right
direction when in Auto Stabilized Mode and the Neutral Value is already recorded.
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Now you need to fine tune your FY31AP stability gain via flight tests. For the first flight it is
recommended that the gains not be set too high. To avoid excessive oscillation (flight
overcorrection) put the gyro gain at mid point.
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Take off in Mode 1 (Manual Mode). After achieving safe height, activate Mode 3 (Auto
Stabilized).
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Aileron Gain: If you see oscillation of the wings, this indicates the Aileron gain is set too high.
Switch back to Mode 1 and land the airplane.
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Reduce the sensitivity (move dial towards centre position) and fly again. You should see