Originally Posted by Balr14
You know, after thinking about it some more, raising the throttle above center increases pitch, which moves the servos. These are not 3kg servos, so they are going to strain to raise pitch which could heat the ESC. Steve, you know electronics. What do you think?
Try removing the blades and raising throttle to max. Weak servos shouldn't have a problem raising cyclic with no blades.
If the servos are stalling out, then the motors in them would be pulling constantly. A DC motor that is stalled will pull 3-4x as much current as a running motor. (good way to burn out motors too) totally possible that is taxing the bec section of the esc.
(btw, I am EE too