How to set up an Octocopter Coaxial frame in PX4/QGroundControl

PX4 Autopilot
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I’m trying to build an Octocopter coaxial frame (16 motors, 8 arms, two motors per arm) and I plan to use PX4 firmware with QGroundControl. I am using Pixhawk 6C, so there are 16 pins on both Main and Aux PWM.

I’m a bit unsure how to set up this geometry in the PX4 or frame configuration.

  • Which airframe type should I select in QGroundControl, as I can’t find this airframe type?

  • Any tips or documentation on motor order and rotation direction for coaxial setup?

Thanks in advance for your help!

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