"Yes, 3 kgs is the actual payload and I recalibrated the radio as well. Under 60 Amps I meant in total, which means 15 Amps per ESC.I will try bigger propellers and higher pitch first, hopefully it will get it flying but most likely I will have to…"

"Just started to recalibrate my radio endpoints and it seems that when I center the pitch stick then it swings between values 1484 and 1476, yaw and roll are between 1475 or 1474. Could this be the reason? "

"Crash was due to human error, I flew close to buildings, lost the gps signal and crashed it into a nearby building. It came down from about 2-3 m but luckily fell on its legs. I replaced some motors but it had no effect, some of them are still…"

"Thanks for the ideas. I will have to check the motors in the evening. Could this explain also why some PWM values stay high up after acceleration? Just like there was a delay or something. One thought was that it could be a software issue with very…"

"Hey, The same problem came along after a crash. The frame was a bit broken so I bought a new one, X4 instead of previous Y6 and put the copter back together. Loaded new firmware to APM and recalibrated the ESC's just in case. Now the problem that…"

"Thank you again!
Everything is working correctly and the ESC-s do not get hot at all. Problem solved :)"

"It seems that it is working now after I programmed the esc as you reccommended!I will try to take off and have a test flight to be sure but at the moment everything seems to be good.

Thank you very much!"

"Thanks! I will try to do as you reccommended. How can I change the value for Motor spin on arm speed, I could not find it on the parameters list?"

"Motors: NTM Prop Drive Series 28-30 900kvhttp://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=52858
Battery: 3S, 11,1 V, 5000 mAh

I read about the SimonK software but I would not like to go that way, it seems too risky that I could burn…"

"Thanks for your response. 

I followed your instructions but still no change, the dfifference is about 200 at full throttle and at one point one of the motors stopped completely. "