APC AP0503E Propeller 5x3E for Speed 400 Motor  [AP0503E]

Service propeller for Speed 400 motor use

The APC AP0503E is a compact 5x3E electric propeller intended for RC models using Speed 400 motors. It is supplied as a practical replacement option where the 5x3E specification is required.

Fit and compatibility: built for direct-mount 5x3E props on electric models driven by Speed 400 class motors. Always confirm your motor shaft diameter and the correct mounting hardware to guarantee a secure fit and correct seating on adapters or spinners.

Installation and tuning role: secure the prop with the motor's recommended adapter or collet, torque mounting hardware to appropriate values, and verify concentric alignment to minimise vibration. Small props change motor loading and throttle characteristics, so only swap to sizes compatible with your motor and ESC. Balance the prop to preserve smooth operation and reliable telemetry.

Safety and maintenance: check blades for any nicks or splits before flying and replace if necessary. Ensure the rotation and pitch orientation match the airframe and conduct early low-throttle checks while the model is restrained to confirm clearance and smooth running.