Building a VTOL Fixed-Wing and need to switch off 2 motors

[OskarTango]

Hello together,

I like to build a VTOL Fixed-Wing and need to switch off the 2 front motors.
2 modes: drone mode and fixed wing mode.
Is there a possibility to swich off or at least idle the front motors in the fixed wing mode?
Using Betaflight and Omnibus F4 V3 board, at the moment.
The back motors are tillt during transition, front are fixed.

Thanks for help
Oskar

 

[holtneil]

Hi can you use a different mode in the FCB to shut off front motors , your need to programe it , sorry not used betaflight one of the guys will give you more info than I can

 

[Dugdog47]

So you want to take off with four motors and switch to two motors in mid air? Sounds cool I'm sure it's been done but i don't think anyone here has built one.

 

[OskarTango]

well, the build was easy, but I did not know how to program the FC over CLI when switching modes :-(
So flying with the test plane is a little tricky

 

[wafflejock]

Think if really want to do this on a single board you'll need to define multiple custom mixers and figure out how to get betaflight to switch the mixer being used with the "modes" tab or a switch/aux input setting the given mixer to switch between "quadcopter mode" and "fixed wing mode". Did a bit of searching and see some others have done this by just having multiple flight controllers and using a switch to change the mixer settings on the TX side to communicate with one FC or another effectively, here's the docs on mixer setup (still would need to figure out how to switch custom mixers with a switch/aux/mode):

betaflight/Mixer.md at master · betaflight/betaflight

Open Source Flight Controller Firmware. Contribute to betaflight/betaflight development by creating an account on GitHub.

github.com

 

[wafflejock]

You may also be able to use the aux command to map an aux channel to something other than what's presented in the GUI but still not seeing the exact path from make a mode that controls a custom mixer:

betaflight/docs/Modes.md at 025ee87a7aca068e3659fd066b8a9afbed123361 · betaflight/betaflight

Open Source Flight Controller Firmware. Contribute to betaflight/betaflight development by creating an account on GitHub.

github.com

 

[OskarTango]

Thx wafflejock ,

thats what I also find out, but have problems to switch the modes via AUX.
I'm already this far, that I just switch off power off the 2 ESC ...
Quick but dirty
Not happy

 

[worldronemarket]

Maybe arduPilot firmware will solve your problem.