The APC AP305150E-B4-BD kit contains three-bladed propellers made for FPV racing quads, offering replacements or an easy way to experiment with flight feel. The pack includes both clockwise and counterclockwise props to match standard race setups.
Marked BD5.1x5E in the product ID, the set provides two CW and two CCW blades so you can pair motors correctly without in-field prop swaps. These props are designed for model multirotors and must be used with suitable motors and mounting hardware.
To fit, place each prop on the motor shaft respecting the recommended sequence and rotation direction from your frame maker, use the correct nut or collet, and tighten to spec. Verify motor rotation before flight and secure fastenings according to the hardware manufacturer's guidance.
When tuning, try the matched rotation pairs to assess yaw balance and handling; always static-balance props and replace any with damage after impacts to maintain stable flight characteristics.
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