"If you plug the ESC's into the APM it will work.
Some ESC's are very sensitive to the undefined earth connection from the PDB.
You could try an extra earth connection from the APM to the PDB, that may help.
Personally I just plug them…"
"The default will be RTL or Land.
In the Config/Tuning window of Mission Planner you will find the default setting.
Change it to 'continue in Auto'
I would advise spending some time going through Mission Planner and the Parameters screens…"
"Your lacking detail for your setup which makes it hard to give any sort of detailed response.
Beeping ESC usually means that they are not receiving a valid signal.
What brand of ESC?
How have you got them wired up?
Are you using a BEC to power the…"
"Check the balance of your gimbal, it sounds like it is node/tail heavy which is beyond the capabilities of the brushless motors.
It will of course work fine if the copter is tilted because it is not trying to lift any weight.
"I have had a quick look but the basic info is a bit beyond my interpretation, especially the ERR and PM lines.
Are you in Stabilise mode during your flights?
Can you enable motors and IMU in the log and do another test flight?
There is definitely…"
"Good move to include a video but a few more details would be appreciated to allow analysis of your problem.
What APM are you running?
What version of Firmware have you installed?
Can you upload the flash log from the APM so we can see what the quad…"
"For the first time ever I had my quad just fall out of the sky, and your post has prompted me to +1 this.
I have not yet analysed the log file, but I loaded 3.1rc7, did an erase and reset, recalibrated everything except compassmot and did some test…"