Electric Slow-Flyer Propeller 9x3.8 - APC AP0938SF  [AP0938SF]

Designed for gentle low-speed electric flight

This APC AP0938SF propeller is an RC-scale spare built for electric slow-flyer models where predictable low-RPM thrust and smooth throttle response matter. The 9x3.8 marking denotes diameter and pitch, which together shape thrust output and motor loading for relaxed cruising and basic trainer sorties.

Fitting is simple: slide the propeller onto the motor shaft following the rotation arrow, ensure the prop seats flush against the hub or spinner, and lock it with your existing nut or spinner hardware. Verify adequate clearance from the airframe and control surfaces before powering the system.

From a tuning perspective, the 9x3.8 offers improved low-end thrust at the expense of some top-end speed. If you change prop size or pitch, recheck motor load and ESC settings to maintain safe operating temperatures and current draw for your electric drive.