atbetaflight/docs/Safety.md

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Safety

As many can attest, multirotors and RC models in general can be very dangerous, particularly on the test bench. Here are some simple golden rules to save you a trip to the local ER:

  • NEVER arm your model with propellers fitted unless you intend to fly!
  • Always remove your propellers if you are setting up for the first time, flashing firmware, or if in any doubt.

Feature MOTOR_STOP

The default Cleanflight configuration has the MOTOR_STOP feature DISABLED by default. What this means is that as soon as the controller is armed, the propellers WILL begin spinning at low speed. It is recommended that this setting be retained as it provides a good visual indication that the craft is armed. You can read more about arming and setting the MOTOR_STOP feature if desired in the relevant sections of the manual.