APC AP0938SF 9x3.8SF Propeller for Electric Slow-Flyers  [AP0938SF]

Propeller characteristics for low-speed flight

The APC AP0938SF is an aftermarket prop designed for electric slow-flyer models where smooth low-speed performance is a priority. The 9x3.8 size specifies the diameter and pitch that influence thrust delivery and motor loading for calm, controlled flying sessions.

Installation is direct: orient the prop according to its rotation marking, push it onto the motor shaft until it seats against the hub or spinner, and secure it with your model's fastening hardware. Always confirm there is sufficient clearance around the prop and check for any rubbing before applying power.

On the tuning side, the 9x3.8 focuses on better low-RPM thrust rather than top speed. If you alter prop diameter or pitch, evaluate motor current and ESC temperature to make sure your electric system remains within safe limits.