TrueRC 2X3S1P 5000mAh + NEU 1515 1.5D + MMM = FIRE!

[Arct1k]

I've had 3 MM's go up in flames... 1 was due to a failed rotor - The others were the same setup I had previously used.

I concluded it was the "weak" batteries - When I added extra capacitors to the MM I have since not had an issue. I believe the issue is that under large amp draw the batteries voltage dip - this creates "voltage ripple" into the ESC that without suffecient buffer i.e. capacitors the ESC can't take it and basically self destructs.

I would guess this is what happened to you...

The damage was done probably when you pulled the trigger from stationary as this is when the amp draw hits...

ps that is the lay persons explanations - search on voltage ripple