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B. Propulsion System
(1)Propellers
① Check by sight if propeller clamps are cracked or deformed and if the blades are loosening, damaged,
bent out of shape or softened.
② Check if the blades and clamps are properly joined.
③ Check if the setscrews holding the clamps and motors are missing or loosening.
④ Wipe the propellers clean with a damp rag.
(2)Motors
① Remove the propellers and clean the motors with an air blow gun.
② Rotate the motors and check whether the bearings wobble or make noise.
③ Check by sight if the enameled wires of motors are broken.
④ Gently rock the motors and see if they are firmly fixed on the motor mounts.
⑤ Check the connectors and cables between motors and ESCs.
(3)ESCs
① Remove the power plugs of the ESCs and check if the metal parts are deformed or oxidized.
② Check if the setscrews on the ESCs are missing or loosening.
③ Check if fouling such as pesticide deposits occurs in the heat dissipation part of the ESCs.
