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I have a small quadcopter and after around a 10 minute flight, I can feel it gets very hot. Is this normal?

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  • $\begingroup$ What on the quadcopter gets hot? Motors, ESCs, VTX, FC? $\endgroup$ – Schome1 Apr 16 at 11:18
  • $\begingroup$ @Schome1 Mainly motors and ESCs $\endgroup$ – Xnero Apr 16 at 11:20
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"Hot quadcopter" is a bit broad of a term, a lot of things can be hot in there.

  • Maybe it's the VTX, then it's normal, they can get hot up to 80C. You might want to use a heatsink though, depends on your VTX.
  • It might be the Flight Controller's CPU itself. For example, F7 processors can get hot up to 70C
  • It also might be motors. If you can barely touch them then:
    • You might have a bad tuning on your quad:
      • High D gain
      • Not enough filtering
    • Conductivity problem, you might have too long motor screws and they are touching the windings.

Sources and additional info on hot motors:
https://oscarliang.com/check-motor-screws-touching-winding/
https://oscarliang.com/mini-quad-motors-overheat/
https://youtu.be/eo2sjTNS0pc

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It is normal for a drone to get hot after a flight, especially the motors as they spin up to a few hundred times per second. If the drone becomes so hot that you can barely touch it, that could be a sign of an overheating motor and you may have to replace your motor.

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