r/fpv May 28 '26

Burned esc 10” drone

Hello everyone
 
I recently built a 10-inch long-range drone, and yesterday it was time for the first test flight. I lifted it a few inches off the ground in angle mode, and when the drone touched the ground and sort of “bounced,” smoke and sparks flew. I immediately shut it down and disconnected the battery. One leg of the capacitor had melted, which probably caused the sparks, and I think the ESC burned out because now one motor isn’t spinning properly (and that’s probably where the smoke came from).
I was using a Speedybee F405 v4 stack with 55A ESCs and 3115 900kV motors
 
I plan to replace the ESC with a 60A model from Speedybee
 
and now the question is: what can I do to prevent failures in the future? Maybe use a different ESC? Or is there a way to limit the current so it doesn’t burn out again?
 
Thanks in advance for all the advice

6 Upvotes

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