Feiyu Tech FY-31AP Flight Controller 3 Axis Camera Stabilizer Autopilot System with Hornet OSD (FY-31AP + FY-OSD)


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Feiyu Tech FY-31AP Autopilot System with Hornet OSD (FY-31AP + FY-OSD)

1. Attitude Flight Stabilization System (AFSS)

FY31AP is an inertial attitude measurement instrument used for automated stabilization of fixed wing model aircrafts and simple three axis camera gimbals.

FY31AP has an integrated three-axis gyro and three-axis accelerometer which controls the aircraft movement in three-dimensional space.

2. Barometric Sensing and GPS

3. Function Of FY-31AP By using your remote control, the FY-31AP can be turned on or off for the following functions:

  • Level flight– When stabilization is activated, the FY31AP will automatically control the aircraft for smooth easy flying. For beginners in RC aircraft flying, this is advantages as it makes flight easier and increases the student pilot self-confidence. The system can be activated throughout the entire flight duration, from take off to landing.
  • Emergency Recovery – If you lose orientation release all control sticks, maintain throttle and switch ON the FY31AP. The unit will automatically send the correct signals to balance of the aircraft and regain level flight, giving you time to get your orientation and fly the plane back to safety.
  • Autonomous flight–with the GPS module the autonomous flight system of the FY31AP will enable you to fly fully autonomous, with up to 8 waypoints settings on the FY Ground Control Station software.
  • Ground Control Station– the FY GCS software will enable you to fly autonomously to up to 8 waypoints, display in-flight telemetry data, and record that flight for replay and analysis (this requires the optional Data Radio hardware).
  • Automated circling- by activating this function, the aircraft will automatically circle the selected area at a fixed altitude, the centre of the circle is the current point. You can set the circling radius, the default radius is 80 meters.
  • Return to Home – You can set autonomous return to home via a 3 way switch or through your failsafe setting, enabling you plane returning to home should it lose your transmitter signal. Upon reaching the home point it will automatically engage auto circling, while it waits for your further instructions.
  • First Person View – for long-distance RC flight via video transmitter, the FY31AP will maintain the balance of your aircraft. You only need to control the heading of your aircraft and enjoy the view.
  • Firmware upgrade – The FY31AP firmware is upgradable by connecting to your computer via a USB TTL cable. As Feiyu Tech continuously improves the FY31AP system, firmware upgrades will be released periodically.

4. Optional Upgrade with FY-OSD and Data Radio – The FY-31AP provides an optional upgrade combining with the FY-OSD and the Data Radio. With this add-on, you will be able to…

  • First Person View (FPV): by connecting this interface to the FY-OSD, telemetric data such as GPS, flight navigation, AHI can be displayed on your downlink video. On the other hand, it will be easier to operate FPV with the functions of automatic balance and automated return to home.
  • Real time telemetry – real time by-directional telemetry is monitored directly by your ground station computer. Changes to aircraft altitude and flight path can be controlled from your ground station computer.
  • Record and monitor your flight – you can monitor and download your flight path into your ground station computer.

5. FY-31AP Flight Modes – The FY-31AP has three flight modes, you can activate any of the flight modes via a free Receiver channel and a 3-position switch (named as “SW1”) on your computer radio.



Additional Description

Mode 1

Deactivated Mode

In this mode,all control of the aircraft is by the pilot. The FY-31AP does not participate in flight control.

Mode 2

Stabilized mode

In this mode and your transmitter control sticks at center, the FY31AP will continuously send out controlling signal (aileron, elevator, rudder) to ensure the aircraft maintains a stabilized, horizontal flight and constant flight direction. In this mode FY-31AP will not allow acrobatic flights.

Model 3

Path Navigation mode

In this mode, the waypoint will be set according to the flight path to automatic flight.

6.FY-31AP Autonomous Flight Modes – Three autopilot modes are incorporated into the FY-31AP, you can set it via a free receiver channel and a 3-position switch (named as “SW2”)



Additional Description

Autopilot mode 1


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. 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 in 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.

7. Applications – The FY-31AP can be installed in the following aircraft :

  • Normal / Traditional fixed-wing planes
  • Delta-winged plane with rudder
  • Delta-winged plane without rudder
  • Plane without aileron
  • V-tail plane with aileron
  • V-tail plane without aileron

8. Purchase Content of FY-31AP with Hornet FY-OSD

  • 1 x FY-31AP Module
  • 1 x FYGPS (10HZ) Module
  • 1 x Hornet OSD Video Overlay Module
  • 1 x FYCS100 Current Sensor
  • 1 x Related Wirings


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