Update from KK2.0 to APM 2.5

Hi All,

I have a F450 Quad and I have upgraded the whole system from kk2.0 to APM 3.1 with gps and telemetry... system was working fine and I was able to fly with the same esc and motors before but now I can't get the same rpm/power to the motors somehow... I can not get enough power to the motors and it does not take off. I tried calibrating escs over and over again like explained in APM setup instructions, as well as all other calibrations for remote and acc and compass too... I tried adjusting throttle amount from turnigy 9x as well as APM pid settings, but no chance... Could you share your opinion ? Thanks a lot in advance...


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