APC AP10545 Propeller 10.5x4.5 for Free Flight Models  [AP10545]

Free Flight Propeller Details

This APC AP10545 propeller is an RC replacement part specified as 10.5x4.5 for free flight model aircraft. The marking 10.5x4.5 denotes the propeller's nominal diameter and pitch used to align motor and airframe selection on lightweight free flight models. Treat this item strictly as a model aircraft propeller, not for full-size or non-RC use.

Installation is straightforward for most hub-and-nut mounts: remove the existing prop and nut, seat the AP10545 fully onto the motor shaft, then secure with the correct prop nut or spinner hardware for your model. Always use your airframe manufacturer's recommended mounting hardware and torque values to prevent slippage.

Static balancing is recommended before every flight. Balance the propeller and address any heavy spot with careful sanding or trimming on the hub side to reduce vibration. Proper balance lowers bearing wear and helps keep flight characteristics steady, which is especially important on light free flight airframes.

On performance: the 10.5x4.5 size offers a compromise between climb and cruise for electric free flight or motor-assisted gliders; changing diameter or pitch will alter acceleration, top speed, and load on the motor. When testing different props, change only one variable at a time and monitor motor temperature and power draw to stay within safe limits for your ESC and motor.