APC AP305040E-B4 FPV 3-Blade Propellers 5x4E Bundle (2 Standard & 2 Reverse)  [AP305040E-B4]

Overview of 5x4E Three-Blade FPV Props

The APC AP305040E-B4 pack includes four three-blade props in a mixed-rotation configuration: two standard and two reverse. This combination is useful both as replacement hardware and for matching flight characteristics across race and freestyle quads that use three-blade blades.

Why choose three blades: the extra blade increases thrust density and refines control authority over two-blade designs, improving midrange punch and offering a different handling profile for pilots refining their setup. Reference the 5x4E size when selecting compatible parts.

Compatibility checklist: confirm your motor shaft diameter and the prop hub bore or use the correct adapter, fit props matching the motor spin direction, and secure them with suitable nuts or collets. Ensure there is no interference with frames, cameras, or gimbals.

Balance and inspection: use a prop balancer to eliminate heavy spots, trim or replace blades as needed, and retire any prop showing cracks or delamination to avoid introducing vibration into the airframe and flight electronics.