APC AP05545E-B4 Propeller 5.5x4.5E FPV Racing Bundle, propeller spare set (2 standard & 2 reverse) pcs  [AP05545E-B4]

5.5x4.5E FPV propeller bundle

This APC AP05545E-B4 bundle is an RC-scale propeller pack intended for FPV racing use, supplied as a matched set with two standard rotation and two reverse rotation pcs to support typical quadcopter motor layouts that accept 5.5x4.5E blades.

The set is presented as replacement and tuning spares rather than a performance claim; use these props where a 5.5x4.5E blade fits the motor shaft and mounting hardware on your quad. Keep the props paired by rotation when fitting to a four-motor platform so motor torque and yaw balance remain correct.

Installation notes: mount each prop in the correct rotation position, secure fasteners to the usual torque for your frame and prop adapter, and check runout before flight. Replace any prop showing visible nicks, delamination, or imbalance rather than attempting repairs.

Tuning role: swapping blade sets or changing between standard and reverse rotation in matched pairs is part of trimming thrust, responsiveness, and throttle feel on FPV quads; small pitch or blade-size changes alter acceleration and efficiency, so test changes incrementally.