One motor winding discolored


After a 30min flight the other night I noticed one of the windings in only one motor was discolored.

Does anyone know if this is a bad sign of near future motor failure? Or perfectly normal and acceptable?

I have yet to see this happen to any others.


(Tarot 4114 320kv motors)

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  • the insulating enamel is burnt off.

    It's due to a internal shortcut (often a physical damage, like a screw that pressed into windings), or faulty winding (manufacturing error, wrong direction, whong configurations etc)

    Regardless, the motor is garbage, it may "run" but it's not performing as expected, and is less effective.

    • Cool, thanks.

      I swapped it out. Better safe than sorry and picking up pieces.

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Shivchand Jaysaval liked Shivchand Jaysaval's profile
Aug 25