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

The APC AP17125N 17x12.5N narrow blade propeller serves as a replacement part for 140-pattern fixed-wing aircraft. The reduced blade width modifies aerodynamic loading versus wider props, offering an option for tuning thrust and engine load on sport and scale models.

Fitting is typical for experienced modelers: make sure the spinner and prop adapter match the 140-pattern mount, attach the prop with the appropriate nut and washers, and carry out static and dynamic balancing before flying. Follow normal safety checks when changing props, including thread verification, proper prop nut torque, and clearance inspection for control surfaces and spinners.

Tuning-wise a narrower blade often shifts the motor load toward higher RPM and lowers blade-induced drag at speed, affecting throttle feel and climb. Use prop balancing and monitor motor and ESC temperatures while iterating to reach the best setup for your aircraft and flying style.