Thanks @JulianOes @ryanjAA . I’m a little furious this went into the flight stack without docs. I’ve added Fixed Wing Loiter Modes - Orbit and Figure 8 by hamishwillee · Pull Request #26194 · PX4/PX4-Autopilot · GitHub and reopened Need Support Figure of eight (8 figure) loitering by QGC · Issue #12778 · mavlink/qgroundcontrol · GitHub
@fly_check This works via MAVLink directly too (tested). Note though that you ONLY get an ACK from the command on Fixed wing and it isn’t clear what values in the command are respected. I am checking.