This APC AP305150E-B4-BD propeller set is tailored for FPV racing multirotors and supplies matched three-blade props for spare or tuning use. The mixed-rotation format supports common race-frame motor pairings.
Labelled BD5.1x5E, the kit comprises two standard and two reverse rotation pieces to enable correct motor matching without on-the-fly swaps. Designed for model multirotors, they should be used only with compatible motors and mounting systems.
Installation: fit each prop to the motor shaft using the frame maker's recommended order and rotation, secure with the appropriate nut or collet, and ensure the leading edge aligns with the rotation. Always check motor rotation before power-up and use thread locking if advised.
For tuning, employ the paired standard/reverse props to assess trim, yaw and low-speed handling. Balance every prop prior to use and replace blades showing damage to avoid excess vibration and instability.
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