4.75x4.75 EP Reverse/Pusher Prop for Speed 400 - APC AP04747EP  [AP04747EP]

EP reverse/pusher propeller for compact models

The APC AP04747EP propeller is an RC-scale replacement marked 4.75x4.75 for EP electric use with Speed 400 motors. It is intended for hobbyists installing reverse or pusher props on small electric airframes where rotation and prop sizing must match the motor setup.

The 4.75x4.75 label gives nominal diameter and pitch figures that help estimate thrust and motor loading for a Speed 400 drive. Use those numbers together with expected RPM to decide if the prop suits your setup. Since this prop is for reverse/pusher mounts, confirm the motor rotation and how the hub is secured prior to final fitting.

Fitment tips: measure your motor shaft, select an appropriate adaptor, ensure the prop is seated squarely and tighten retention hardware to prevent slip. After installation perform static balancing and a low-throttle run to detect vibration or excessive current. To tune performance, adjust gearing, battery choice and ESC configuration to maintain safe Speed 400 motor operation.

Tuning impact: swapping to this pitch and orientation is a simple way to evaluate changes in climb, cruise and static thrust; expect differences in acceleration and steady RPM as you vary pitch or direction.