APC AP305150E-B4-BD 3-Blade Multirotor Propellers — 2 Standard & 2 Reverse  [AP305150E-B4-BD]

Race-Ready 3-Blade Props

APC AP305150E-B4-BD provides a bundle of three-blade propellers aimed at FPV racers and hobbyists seeking matched rotation sets for multirotors. Use them as spares or to refine flight performance.

The package carries BD5.1x5E marking and contains two standard and two reverse rotation pieces so motors can be paired correctly without swapping during a session. These are intended for model multirotor applications and must be mounted only on appropriate motors and hubs.

Fitting is straightforward: attach each prop to the motor shaft following manufacturer-specified rotation and mounting order, use the correct securing hardware, and check to ensure the leading edge faces the rotation direction. Confirm spin direction before each flight and apply thread locker if recommended.

For setup and tuning, use the mixed pairs to judge yaw control and low-speed stability. Static-balance blades before flight to minimize vibration, and replace any prop that is nicked or cracked.