16.5x13W Wide Blade APC AP16513W Propeller — 120 Pattern Spare for RC Models  [AP16513W]

16.5x13W wide blade — tuning and fit

The APC AP16513W is supplied as a 16.5x13W wide-blade propeller and carries the 120 pattern note in its description. The increased blade area modifies the airflow and loading compared with slimmer props, which can be used to refine climb and throttle feel on electric models. This text emphasises practical fit checks, simple setup steps, and the blade's role in trimming and balance during flight trials.

Compatibility is broad across RC electric aircraft and park-style models that accept the 16.5x13W mounting pattern; always verify hub diameter and spinner clearance before installation. Fitment follows common prop replacement steps: check the hub and motor shaft for wear, ensure the prop sits flush on the adapter or motor face, and secure it with the correct sequence of nut and washer hardware supplied by the model. Match the prop rotation marking to the motor rotation.

Good balancing and sensible trim are key to consistent results with a wide blade. Carry out static balance checks before first flights, then run a low-throttle ground vibration test. If vibrations continue, re-inspect hub seating and spinner alignment, and apply small control surface trim corrections rather than attempting to alter prop shape. The wider blade often increases thrust at lower to mid throttle, so adjust throttle curves and keep an eye on motor temperature during initial flights.

When comparing props, log RPM and flight notes rather than relying on feel alone; a methodical change-and-test routine produces reliable tuning data. Include the AP16513W in iterative setup procedures to refine climb performance, cruise efficiency, and handling balance for your model and powertrain.