Sputtering 9920 and hot caps

[BrianG]

I wonder how caps can get hot. All they do is filter/couple AC or store a DC charge and unless you are charging and discharging them with large currents (which shouldn't happen if the batteries are any good), they should never get hot. Maybe the circuit board traces are transferring the heat to the caps?

At any rate, lots of heat anywhere means lots of current and a relatively high voltage drop on the ESC, which should not occur with all those FETs paralleled the way they are. I would think several FETs are burned out increasing the circuits total output resistance which then generates more heat.

More heat could also be caused by low output batteries forcing the ESC to supply more current to compensate (in a way).