5x4E 3-Blade FPV Prop Set - APC AP305040E-B4 (Mixed Rotation)  [AP305040E-B4]

High-Output 5x4E 3-Blade Propellers

The APC AP305040E-B4 kit contains four three-blade props arranged as a two-standard/two-reverse rotation pack intended for FPV multirotors. Use this set as spare parts or to fine-tune handling on racing and freestyle machines that run three-blade configurations.

Design intent: three blades offer increased midrange thrust and tighter control compared to two-blade types, making them useful when dialing in aggressive flight characteristics. Refer to the 5x4E designation when comparing sizes and ordering replacements.

Fitting guidance: verify hub bore diameter and thread style against your motor, fit props matching motor rotation, and secure with the correct mounting hardware. Inspect props for damage and ensure they are seated without contacting frames, gimbals, or cameras.

Care and longevity: regularly balance props on a prop balancer, remove minor high spots if practical, and retire any prop that retains imbalance or shows structural damage to protect ESCs, flight controllers, and cameras from vibration. Rotating between standard and reverse blades can help even out motor wear.