title_body: New Prebuilt Drone flipping on takeoff I have a small quadcopter drone, immediately on takeoff it flips upside down, this happens all the time.
  
  What could be a potential problem?
  
  Edit: It is prebuilt and bought from a shop and has never flown
upvoted_answer: There are several things that can be causing this with different likelihoods.
  
  The first thing to check is - are your propellers on correctly? It is an easy mistake to make and always worth a check.
  
  The next thing to check is that all of your motors are working correctly. Start by spinning each of the motors by hand and see if anything feels obviously wrong, for example, a magnet out of place. If nothing feels wrong, remove the props and individually spin up the motors in Betaflight to test them. Make sure that they spin the direction that betaflight shows in the configurator.
  
  The next port of call is your gyro. Plug your quad into Betaflight or whatever firmware you use and move it around - does the virtual representation of the quad match up with your movements in real life? If not, that is almost certainly the cause.
  
  If all of these have failed, swap two of your motors and see if the quad flips in the same direction. If the problem follows the motor, you have a faulty motor. If the problem stays in the same place, you have a faulty ESC.