Running Pixhawk with 3.4. I want to setup failsafe, so i went outside, flew it away from me. Flicked RTL and it flew back to where it was supposed to be… But then it stayed in the air for like 5 seconds and disarmed (i suppose, all motors turned off). Crashed and broke a gimbal 
- How could this happen? I’ve read that maybe it’s a broken barometer? and that it doesn’t know its altitude. Suggestions welcome.
Without logs it would be tough to know what happened.
Log file not very large.and it only appears that you flew this in stablize. Logs do indicate however your RTL altitude is just 5 meters? I have to guess, from the contents of this log file, that this isn’t the flight you’re talking about.
Am i not supposed to RTL on stabilize mode?
This is not the log file from the crash. No RTL in the log at all. You must of re-armed after it crashed and then shut it off. Check for other log files.
Mike
You can but in order to have RTL you have to have GPS lock.
I downgraded to copter 3.3 and changed disarm delay to 60 seconds and it worked. Not sure if the former or latter that fixed it.
Is this a very overpowered copter by any chance?