I've got a MK hexa xl kit that I've just finished putting together, and it tries to flip on takeoff. I'm running + config with Arducopter 2.1 firmware.
I checked out the motors with the CLI command, calibrated ESC and radio. In APM Planner setup inputs from the radio are correct.
The hand test gives a first problem: the pitch is reversed (pitch stick forward and hexa points back with motor 1 faster) so I set to reverse on the radio. (but the motors command in CLI give me all ok...)
At take-off throttle gently tilts the hexa, with strong throttle gets going right and then almost stabilized in flight with a tendency to always go to the right. Each time, not to miss the exa, I have come down with a crash.
The motors are MK3638 with propellers 13x4.5 CF with payload a GoPro . Lipo 3S
The propellers are too powerful and create instability? For a total weight of about 2.5 kg such propellers are recommended?
In bench tests, in APM Planner status I see with minimal throttle trigger all channels 1-2-3-4-7-8 in 1189 but with more throttle only increase the channels 1-3-8. Is it OK that arducopter run a hexa take off as a tri?
I am a little frustrated because after 4 attempts at flights I broke about a dozen propellers and an arm of the frame.