This APC AP1107SFP is an RC-scale propeller designed for electric slow-fly models where either a pusher or reverse (tractor in rear-mounted reversed rotation) installation is required. The 11x7 marking identifies its nominal diameter and pitch which helps builders match prop size to motor and ESC choices for gentle, low-speed performance.
Fit and compatibility: use this prop on lightweight slow-fly airframes with compatible shaft diameters and mounting hardware. Verify hub bore size and thread direction before mounting, and confirm your motor direction setting matches the intended thrust orientation when used as a pusher or in a reversed layout.
Installation tips: mount the propeller with the hub faces oriented as per the model's thrust direction, tighten the retaining nut to prevent slippage without over-torquing, and secure with a thread locker if the installation calls for it. Perform a static balance check and spin test at low throttle before the first flight to ensure smooth operation.
Tuning role: this propeller is intended to provide increased static thrust at low RPMs for stable slow-speed handling and economy of power on electric slow flyers. If flight behaviour shows excess vibration or poor climb, inspect balance, verify motor timing and ESC settings, and consider adjusting prop size only within the range recommended by your airframe or motor manufacturer.
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