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F-TEK 31AP Flight Stabilization Controller & F-TEK OSD Combo

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F-TEK 31AP Flight Stabilization Controller & F-TEK OSD Combo

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The F-TEK 31AP is an inertial attitude measurement instrument used for automated stabilization of fixed wing model aircraft and simple three axis camera gimbals It features an integrated three-axis gyro and three-axis accelerometer which controls the aircraft movement in three-dimensional space.

The F-TEK 31AP also incorporates an accurate barometric pressure sensor. At start up, the take-off air pressure is measured, providing the autopilot with an accurate relative height data.
This flight controller supports the use of aGPS module which enables the autopilot to calculate the flight course and exact location of the aircraft. This allows for precise GPS positioning as well as "return to home" functionality. If the FY31AP is not connected to a GPS module, the autonomous flight system cannot be engaged and it will function purely as a flight stabilizer. 

overlays flight telemetry information onto your video image. The telemetry information displayed includes flight altitude, flight speed, flight direction, home direction and so on. You also can save the telemetry information to a MICRO SD card (available separately). The

F-TEK OSD/F-TEK 31AP combo includes the F-TEK 31AP to display autopilot telemetric data, and a GPS receiver to display positioning data.

F-TEK OSD automatically adapts to either PAL or NTSC video input and confirms if there is a MICRO SD card or not. The adaptive processes are within about 20 seconds.

Once the input video is detected (even if there is interruption to the video signal), the telemetry data of the F-TEK OSD will continue to be transmitted via the video stream.


• Level flight - When stabilization is activated, the F-TEK 31AP will automatically control the aircraft for smooth easy flying. For beginners in RC aircraft  flying, this is advantageous as it makes flight easier and increases the student pilot's 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 F-TEK 31AP. The unit will automatically send the correct signals to balance of the aircraft and regain level flight, giving you time to regain your orientation and fly the plane back to safety.  
• Autonomous flight - with the GPS module the autonomous flight system of the F-TEK 31AP will enable you to fly fully autonomous, with up to 8 waypoints set on the Ground Control Station software.
• Ground Control Station - the 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 center 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 your aircraft to return 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 F-TEK 31AP will maintain the balance of your aircraft. You only need to control the heading of your aircraft and enjoy the view.

F-TEK 31AP Specs:
Input voltage: 4.0 ~ 6.0V
Current draw: 50mA (5V)
Size: 47x27x20 mm
Weight (excluding wires): 25g
Temperature range: -25 ° C ~ +70 ° C
Maximum rate of rotation: ≤ 2000 ° /s

F-TEK OSD Specs:
Input voltage: 3.0 ~ 3.3 Volt
Current draw: 60mA (3.3V)
Size: 32x32x10mm
Weight (excluding wires): 22g
Temperature range: -25 ° C ~ +70 ° C

Package Includes:
F-TEK 31AP Flight Controller
F-TEK OSD System
Current Sensor
GPS Module
All required connection cables w/USB

Manufactured under license for HobbyKing by Feiyu Tech. 100% compatible with Feiyu Tech software/firmware and supported by the HobbyKing global warranty network. Visit for the latest software and firmware.

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| Verified Buyer

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Certified Buyer Rated

Dec 17, 2012

I saw my friend this product. really excellent

dibedu | Verified Buyer

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Customer Rated

Nov 28, 2012

with 2,1km my video transmitter stopped to send images (batery fail). my plane returned without any problems using RTL mode. this little piece of useful technology saved my US$1500 plane. Thanks HK and FY!

ANGEL | Verified Buyer

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Customer Rated

Oct 12, 2012

Decir, que el copiloto hay que instalarlo lejos del receptor de la radio, de lo contrario, cuando le damos RTL, se vuelve loco y no vuelve directo.

ANGEL | Verified Buyer

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Customer Rated

Oct 08, 2012

Hola amigos.
Acabo de instalar el osd y copiloto de hobbyking copia de hormet.
Tiene vuelta a casa, vuelo en crculos, vuelo manual, vuelo con copiloto, vuelo hacia un punto
Evidentemente viene sin manual, pero un aficionado me lo ha pasado traducido.
De momento he volado cinco vuelos de 20 minutos.
He de decir que la vuelta a casa RTL, hace un poco el tonto y le cuesta un poco encontrar el rumbo de vuelta, da un poco de miedo pues a veces aborto, dado que el rumbo tomado no parece el adecuado.
Cuando llega a casa pasa de RTL a vuelo en crculos ACM, de forma automtica.
El osd se calienta bastante, es bueno ponerlo fuera, bien refrigerado, en los foros comentan que por culpa de que se calienta, se producen reseteos intermitentes, por suerte a mi, no me ha pasado.
El primer vuelo fue des animador, pues los mandos iban bien en tierra y en vuelo manual, pero en vuelo al poner piloto, el avin empezaba a hacer lupins y picados, hasta que revisando descubr que la direccin de los mandos no era la misma con vuelo manual que con copiloto y al activar el copiloto el mando de profundidad, actuaba al revs.
Otra cosa a tener en cuenta, es la posicin del cable blanco y negro que va del copi al osd, si se pone invertido, el osd se resetea indefinidamente.
Sobre todo, no olvidis configurar el fail safe, yo lo he puesto con un

NITROSAVY | Verified Buyer

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Customer Rated

Sep 24, 2012

Just got my f-tec 31ap and set it up in my park zone radion glider one word wow! This thing is bloody amazing I flew it out of sight and then flicked on the auto return it came right back to me then started doing circles until I took control back this system is going to be great for my fpv setup worth every penny.

IntegratedNeck | Verified Buyer

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Customer Rated

Sep 15, 2012

I own the fy-31ap trade edition which this is. I find the hornet OSD to be excellent. The auto stabalization works flawlessly. However, return to home is abit hit and miss. It requires a stable plane with typical characteristics. A warning about the software though, at this stage (an has been so for many months), it is very very unreliable. The software quits, creates errors and corrupts itself requiring a uninstall and deletion of the software. It also requires a fast pc core I series, 4gb ram etc. The software is full of spelling mistakes and reading the manual will give you absolutely no idea on what the majority of parameters do. Its very much product that requires a lot of time and testing by the user to understand and configure correctly. That said, I hope that it now being on hobbyking will put pressure on fy to improve the pc software and manual.

Customer files
FY-31AP_Installation&Operation_Manual Download [659]
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