I've used PX4 very successfully with a multicopter, so I decided to give a plane a try.
I have a Phantom FX-61 FPV setup with pixhawk, GPS, airspeed sensor as per recommendations I found here: https://pixhawk.org/platforms/planes/phantom_fpv_flying_wing
When testing Manual mode in the lab I can control throttle and elevons fine, when I switch to Altitude control the elevons are controlled by the autopilot as expected but the motor stops turning immediately... When I switch back to Manual the motor revs up again.
What is happening here? Is the autopilot expecting some other input from user?
I don't have any experience flying a plane (apart from simulator) so I have googled hard to find any instructions on what the process is to use PX4 in a plane, but apart from a description of the flight modes I haven't found any so I'm after pointers regarding the launch/takeoff a wing, what mode is recommended ( manual or altitude control) etc..
I have also found in the forum references to takeoff mode, I have tested it enabling it from QGC (can't see how to do it from Radio) but I get an error beep and this message in QGC:
So to summarise I'm totally stuck... and would appreciate some help.