FeiYu Tech FY-31AP - Manual (Page 2)

Guilin Feiyu Electronic Technology Co., Ltd
Guilin Feiyu Electronic Technology Co., Ltd http://www.feiyudz.cn E-mail: [email protected] Page 2
 Autopilot mode 1: Deactivated. The autopilot function is not
activated , the flight modes are determined by the “SW1”.
 Autopilot mode 2: Auto Return To Launch（RTL）. When activated
in this mode, the FY-31AP will automatically fly the plane back to the
take-off point, while maintaining altitude. (FY-31AP has 50m altitude
protection limited,if the switch point altitude below 50m,FY-31AP
will automatic climb to 50m.) Upon reaching the launch area, the unit
will automatically fly the plane in a circle at a default circling radius
of 80 meters.

Autopilot mode 3: Auto Circling Mode (ACM). When activated this
mode, the plane will immediately fly in a circle. The centre of the
circle is the point of activation . The default circle radius is 80 meters.
The aircraft altitude will be automatically maintained throughout the
ACM. (FY-31AP has 50m altitude protection limited,if the switch
point altitude below 50m,FY-31AP will automatic climb to 50m.)
Autopilot stall warning
a. The FY-31AP has some control over the throttle channel. Therefore,
when flying in Autopilot Modes, please ensure you have enough
forward movement to prevent stalling.
b. FY-31AP may have a control over the throttle channel, but the
throttle control signal is base on the stick control signal and will
auto adjust according the altitude and speed then output the
combined signal. If your forward movement cannot compensate for
the autopilot’s active altitude hold, your aircraft will stall.
c. This is especially important if RTL is part of your RC failsafe. In the
event of RC Link lost, you can set RTL into your Receiver failsafe.
However, please DO NOT forget to also set your throttle failsafe to
between 25 % to 50% to ensure the plane does not stall.
d. Never set your throttle failsafe to zero. If you do so, your aircraft will
RTL in a continuous stalled flight which will result in a crash.
Attention: FY-31AP can work in automatic flight mode, though without
OSD module. Whether you have been connected the OSD or not,
FY-31AP can work normally. But if the FY-31AP is not connected GPS
module, it will function as purely as a flight stabilizer. The autonomous
flight modes cannot be engaged.
11. Red LED Flashing & Gyroscope Re-set:
If the following conditions occur, the FY-31AP initialization is
recommended:
(1) The device has not been used for a long time.
(2) There is a change in environmental temperature of over 30 degrees
since last flight.
(3) The Red LED flashes continuously even when the FY-31AP remains
stationary about 20s, and you never activate the motor.
(4) If the Red LED is on solid all the time even when the FY-31AP is
stationary, it means the gyroscope is faulty, and the unit need to be
sent back for repair.
12. Gyroscope Re-set procedures：
(1) Carry out this re-setting procedure only if the above occur. We do
not recommend regular re-setting. It is not necessary and not
recommended.
(2) The stabilizer unit does not need to be in a horizontal position
during initialization. However, you must ensure there is no vibration
during this process. If you suspect shaking occurred, just restart the
initialization / resetting process.
Initialization / Reset Process
(1) Install the jumper as shown in this
picture:
(2) Power-ON the FY-31AP and keep it
stationary for at least 20 seconds.
You will notice the red light blink
with two different rates.
(3) After 20 seconds, the re-setting / initialization is complete.
(4) Disconnect the power, unplug the jumper & remove it (keep safe for
future use).
13. Flight mode Indicator (Red or Blue light)
By observing the flight indicator, you can easily re-confirm your Flight
Mode switch settings of your radio.
Blue light:
Flight
mode Stabilized
Mode
Deactivated
Mode
Navigation
Mode
Return To
Launch
(RTL)
Auto Circling
(ACM)
Blue LED
light
indicator
Stay on
solid
continuous
flash
Single flash
Double
flash each
loop
Continuous
flashing 3
times each
loop
Note: Navigation Mode: means one of the three modes. Path Navigation mode,
Fixed altitude flight mode and Heading lock flight mode. You can select via the
GCS Software. The default mode is Path navigation mode.
14. GPS status & vibration level indicator
You can check the GPS lock status and vibration level by observing the
Red LED.
Red light:
Status
Too much
vibration
No GPS or
GPS still
not lock
Need to
initialize
Gyro or are
moving
GPS location
fixed
(4 satellites)
Red LED
light
indicator
Stay on
solid
Stay off solid
Continuous
flashing
Continuous
double flash
each loop
15. GPS Receiver
a. If GPS cannot fix the aircraft location (minimum 4 satellites), only
Mode 1 (Deactivated) and Mode 2 (Stabilized Mode) will function.
Mode 3 and Autopilot will not be functional.
b. Install the GPS Module with the antenna face up (see following
picture). DO NOT install next to metal or carbon fiber and other
shielding material, which may block satellite signal.
c. Install the GPS Module away from electromagnetic sources such as
ESC’s, power wires, servo wires and video transmitters.
GPS – Satellite Signal Lost During Autonomous Flight
 GPS provides the aircraft geographic positioning, altitude, speed and
flight direction.
 Only if the GPS Data is available will the FY31AP perform its
Autopilot Modes.
 In case GPS signal is lost during flight , the autopilot will keep its
height and course （not lock）in automatic navigation mode ,but its
course may gradually drift. After GPS signal is regained the plane
will resume the Autopilot Mode.
16. FY-31AP INTERFACE
Green--Signal
Red--- +3.3V
Black- -GND
FY-31AP