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Hi all,

Just started my first project with Pixhawk. I've got it along with a q-brain ESC and multistar elite motors.

everything went smooth until I calibrated the ESCs. Now when I push the throttle up three motors start spinning and the fourth one doesn't until I get to a high throttle point.

I know the problem is not with the ESC calibration as I noticed that all of them kicks in on the same PWM output point. It's something with the pixhawk and it even tend to tip over before taking off.

any suggestion guys.

Thanks