Changing from Multicopter to Fixed Wing Flight Mode

lev_benji · March 9, 2023, 8:59am

Dear all,

I’m currently trying to build a VTOL and I want to test the elevator and ailerons. My problem is that it seems that the aircraft doesn’t switch from multicopter to fixed wing mode. I assigned channel 7 on the RC for the transition switch parameter but nothing really happens when using the lever on the RC. Is there something I need to keep in mind? Currently, there is no airspeed sensor integrated. Could that be the issue?

Thanks for your help!

junwoo0914 · March 9, 2023, 8:41pm

Could you share the flight log?

You can upload via Flight Review: Log Analysis using Flight Review | PX4 User Guide

lev_benji · March 10, 2023, 10:38am

https://review.px4.io/plot_app?log=ad7b1d63-6c45-4397-8ad7-012f920ca999

In the log messages, you can see nowhere that the flight mode is changed. And this wonders me as I used the switch and in QGroundControl it is visible that the switch works.

junwoo0914 · March 10, 2023, 3:16pm

From the log it is apparent that your vehicle isn’t a VTOL (not configured to be):

Also, it sees that your airframe is a ‘Hexarotor’ (Title of the log review):

Is it actually a VTOL? Did you configure it as a VTOL in Airframe selection? (Refer to: Frame Setup | PX4 User Guide)

Could you share the picture of the vehicle? Just to check whether it is actually a Hybrid VTOL or not as well

lev_benji · March 20, 2023, 6:56pm

Thanks for your help at first! We actually defined an old airframe which imports the standard vtol airframe (see attached) so I would guess that the is_vtol parameter should be non zero. Do you have an idea why the is_vtol parameter is zero? Is there more about it than just the airframe?