title_body: Quadcopter getting hot after a flight I have a small quadcopter and after around a 10 minute flight, I can feel it gets very hot. Is this normal?
upvoted_answer: "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