OverviewAPC is proud to provide a line of propellers specifically designed for Multi-Rotor applications Quad-Copters. These propellers bridge the gap between our Thin Electric propellers and Slow Flyer propellers. The ‘MR’ propellers are lighter than the Thin Electrics and have a higher RPM capability than the Slow Flyers.APC Suggested RPM Limits Multi-Rotor Props Maximum RPM=105000/prop diameter inches.