APC AP17125N 17x12.5N Narrow Blade Propeller for 140-Pattern Fixed-Wing  [AP17125N]

The APC AP17125N 17x12.5N narrow blade propeller is offered as a replacement for 140-pattern fixed-wing models. Its narrower planform alters the aerodynamic loading relative to broader blades, which can be useful when refining thrust and RPM balance on scale and sport aircraft.

To fit the prop, confirm your spinner and prop adapter accept the 140-pattern bolt circle, secure the prop with the correct nut and washers, and run static and dynamic balance checks. Always verify thread direction, prop nut torque, and clearance around control surfaces and the spinner before the first flight after a swap.

In practical tuning the narrow blade tends to move the load toward higher rotational speed and reduce drag at cruise, influencing throttle response and climb rate. Integrate prop balancing and motor/ESC temperature monitoring while testing to dial in the best setup for your model.