10.5x4.5 Free Flight Prop APC AP10545  [AP10545]

Free Flight Prop Notes

This APC AP10545 propeller is an RC replacement item, listed as 10.5x4.5 for free flight model aircraft. The 10.5x4.5 marking indicates the nominal diameter and pitch to assist in choosing an appropriate prop for motor and airframe pairing on small electric models. It is intended purely for model aircraft usage.

For hub-and-nut style mounts: take off the existing prop and nut, mount the AP10545 with correct seating on the shaft, and secure with the correct nut or spinner hardware recommended by your airframe maker. Observe specified torque values to ensure the prop cannot loosen in flight.

Always perform a static balance before flying. Use a balance tool and make small corrections by sanding the hub side until even. Reducing vibration preserves motor bearings and improves flight trim, which matters for precision free flight trimming.

On selection: a 10.5x4.5 gives a middle-ground compromise between climb and cruise for electric free flight or motor-assisted gliders. Modifying diameter or pitch will change acceleration, top speed, and electrical loading; when experimenting, alter one parameter at a time and monitor motor temperature and current draw to protect your ESC and motor.