To select the airframe in PX4:
- Start QGroundControl and connect the vehicle.
- Select QGroundControl icon > Vehicle Setup > Airframe (sidebar) to open Airframe Setup.
Select the broad vehicle group/type that matches your airframe and then use the dropdown within the group to choose the airframe that best matches your vehicle.
The example above shows Generic Hexarotor X geometry selected from the Hexarotor X group.
Click the Apply and Restart button on the top right of the screen.
Click Apply in the following prompt to save the settings and restart the vehicle.