Hello all, the hexa i am flying with now is 1600mm, around 7kg without payload and 12kg with payload, and it is not stable at the roll axis. What will be the most common issue?
I am attaching two flights,
1. without payload 2018-03-02
2. 5kg payload strapped to the bottom 2018-03-05. https://youtu.be/hA1cP8OFWN4
I am suspecting the PID gains being unsuitable, but are there any other concerns from the flight log?