BrainFPV Radix LI Wing Kit

  • $99.99
    Unit price per 


The RADIX LI Wing Kit is a complete fixed wing flight control system consisting of the RADIX LI Flight Controller, the RADIX LI Wing Power Board (wPB), and the BrainFPV GPS. This is the smallest fixed-wing flight controller with a full graphical OSD available on the market!

Make sure to read the RADIX LI Wing Kit manual to learn how to use it!


Radix LI Flight Controller

  • Processor: STM32F446RET6, Coretx-M4, 32bit, 180MHz, 128kB RAM, 512kB Flash.
  • IMU: Bosch Sensortec BMI160 running at 3.2kHz, connected using SPI.
  • OSD: Full-graphic, PAL/NTSC auto detect, adjustable black and white levels. Full Betaflight OSD support with extra graphical features. Support for side-by-side 3D when used with a 3D FPV camera.
  • Motor Outputs: 6 outputs with full DSHOT (150/300/600/1200) and OneShot support.
  • Receiver Support: PPM, S.Bus (inverter built-in), DSM, HoTT,  SRXL, CSRF, FPort ready. 5V or 3.3V supply for receiver. Receiver is powered from USB for easy and safe setup.
  • Telemetry Support: FrSKY Smart Port, FrSKY Sensor Hub, HoTT Telemetry, SRXL, CSRF, FPort ready. Built-in inverter for FrSKY telemetry.
  • Serial Ports: 4 full serial ports (UARTs). UART3 and UART6 have inverters for S.Bus and SmartPort telemetry. Inverters are automatically enabled/disabled for maximum flexibility. 
  • RGB LEDs: Dedicated RGB LED output.
  • Camera Control: Dedicated output for accessing the camera menu to change camera settings.
  • Buzzer Port: Dedicated port for 5V (100mA max) buzzers.
  • Analog Inputs: Voltage sensing  (VBAT), current input (3.3V max).
  • Power: 3S - 6S (7.5V - 26V), 500mA BEC
  • Dimensions: 26.5mm x 26.5mm, 20mm hole spacing. 4.1mm holes for anti-vibration grommets for M3 screws.
  • Weight: 4g

Radix LI Wing Power Board:

  • Battery Voltage: 3S to 5S (8V to 22V)
  • Maximum Current: 40A constant, 60A burst
  • Voltage Regulator: Integrated 5V, 3A regulator. By default, servos are powered by the ESC. The wPB has a jumper to enable powering small servos
  • Noise Filter: 5V, 1A  filtered output for clean video (1A is shared with 5V / 3A regulator)
  • Current Measurement: Up to 65A (50 mV/A, current scale: 500)
  • ESC Output: Output for 1 x ESC on servo headers
  • Servo Outputs: Outputs for up to 5 servos on headers
  • LEDs: Output for programmable RGB LEDs
  • Stacking height: 5.5mm (space between RADIX LI FC and RADIX LI wPB)
  • PCB: 4 layer, 3oz (105um) copper per layer. HASL plating (lead-free)
  • Dimensions: 26.5 mm x 34 mm
  • Weight: 5g


  • Uses a genuine uBlox M8 GPS module with up to 18 Hz update rate
  • Supports GPS and GLONASS
  • Superior noise filtering and large antenna ground plane for optimal signal reception
  • Integrated white LED’s to indicate GPS lock (blinks when lock is achieved)
  • Super capacitor based backup voltage supply. Unlike batteries commonly used, the super capacitor is charged in seconds and allows a fast warm start for several hours.
  • Comes in a white plastic enclosure with a BrainFPV logo on top
  • Power: 5 V, 70 mA
  • Size: 31 mm x 31 mm x 12 mm
  • Weight: 13 g

1x BrainFPV Radix LI Flight Controller
1x BrainFPV Radix LI Wing Power Board
1x BrainFPV GPS Module

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