APC AP18112 Propeller 18.1x12 (140 PATTERN) RC prop spare  [AP18112]

Propeller role and installation

This RC-scale propeller bears the designation 18.1x12 and the 140 PATTERN marking, identifying blade geometry and size for model-level thrust tuning. It is offered as a spare prop for electric scale aircraft where blade diameter and pitch are factors in balancing thrust, climb response, and cruise speed.

Installation is straightforward but requires standard RC workshop care: verify shaft fit and thread engagement, inspect the nut or locking system supplied on your model, and ensure the prop is mounted concentric to the motor shaft. Do not overtighten fasteners, and confirm the rotation direction matches the motor rotation specified for the model.

For best performance, balance the propeller before flight using a prop balancer or simple hanging method to remove heavy spots. Minor trimming or swapping to a different blade pitch or diameter is a common tuning step to adapt thrust and top speed to the motor and ESC setup. Always perform low-power test runs to check temperature and vibration after changing propellers.

Safety note: treat this as an RC accessory; keep clear of the rotating prop during test runs and use proper guarding when adjusting or testing on the bench.