With the symmetrical structure of most quadcopters, it is difficult to know which way is front, back, left and right. To help identify these directions, the front of the drone coloured props, while the back is an alternate darker color, such as blue or black. If the props are not colored, then there will be colored LED lights that specify the front with red lights, and the back with another color. Or design your drone/qudad/FPV etc… with own style by putting LEDs and Flaslights.
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