# 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.