APC AP12047SF 12x4.7SF Replacement Prop for Electric Slow Flyers  [AP12047SF]

APC slow-flyer propeller overview

This APC AP12047SF propeller is an RC-scale replacement part sized 12x4.7SF for electric slow-flyer aircraft. It fits airframes that specify a medium-diameter, low-pitch blade intended for smooth cruise and predictable low-speed handling.

Installation is simple: use the aircraft's existing prop adapter, spinner or nut and follow the airframe maker's fastening instructions. Verify thread direction, correct torque and spinner clearance before flight. Balance the blade on a prop balancer or by trial weight trimming to reduce vibration and protect the motor and bearings.

From a tuning perspective the 4.7 pitch favors controllable climb and relaxed cruise on lightweight electric setups. Swapping diameter or pitch will change RPM, thrust and current draw, so confirm ESC and motor limits during initial test flights.