Setting Up the Airspeed Indicator
I. Principle
A Pitot tube is a sensor used to measure aircraft speed. It measures the pressure difference between the dynamic pressure port and static pressure port around the aircraft to calculate the aircraft's airspeed. The dynamic pressure port faces the airflow to sense the pressure generated by the airflow, while the static pressure port faces perpendicular to the airflow to sense the ambient static pressure. The flight controller system uses these two pressure values to calculate airspeed and converts it into speed data for the aircraft. This data can be used for various purposes such as flight stability and flight path planning.
II. Equipment Preparation
1) Flight controller: SpeedyBee F405 WING APP / CoreWing F405 WING V2 flight controllers are both suitable for this tutorial
2) Pitot tube: Digital or analog Pitot tube
3) Connection cable: Interface cable for connecting the Pitot tube to the flight controller
4) INAV ground control station (GCS)
III. Specific Operations
1. Pitot tube installation
--Image source from UAV Instructor WeChat Official Account
2. Airspeed indicator to flight controller wiring
3. Parameter settings
- Open INAV ground control station, click on the Configuration page → find Pitot tube, select AUTO → click Save and Reboot. After the flight controller restarts, it will automatically recognize the airspeed indicator model.
4. Airspeed indicator testing
Click on Sensors, find airspeed, and test if the Pitot tube is working properly.
Important
Block the dynamic and static pressure ports, the value should increase and not decrease, which indicates normal operation
5. Airspeed OSD settings
IV. Q&A
Q: What should I do if the Pitot tube is not working properly?
A: Ensure the wiring is correct, especially that the connections for the dynamic and static pressure ports are secure. Check in the Sensors page if the Pitot tube is displaying normally; if there's no data, restart the flight controller and test again.
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