The inner eight and the outer eight are all ways for the starting motor of the drone to prepare for takeoff.
if you fly over the DJI Elf 3 series UAV, you will know that if you break the lever in the air, the UAV will lose power in the air and fall directly. This is a very dangerous misoperation. If the plane crashes, it will directly threaten the personal and property safety of others and lead to serious consequences.
suggestion: do not break the inner and outer eight poles in the air (the setting of the inner eight poles or the outer eight poles is to stop the motor in an emergency to avoid greater losses). Please operate correctly in strict accordance with the instructions.
it is also a common case of a bomber when it crashes when it is out of control. When there is a tall building between the remote controller and the airplane, which blocks the communication signal between the remote controller and the airplane, the signal is interrupted, and the airplane enters a state of out-of-control return flight. If there is a building on the return flight path that is higher than the set return flight height, it will lead to crashing into the building and exploding the airplane.
suggestion: it is suggested that you do not fly in the field with tall buildings, and choose an open and undisturbed environment to fly. If you must fly, you need to set the return altitude of the plane higher than all the surrounding obstacles.