9x4.5 Multi Rotor Propeller (APC09045MR)

Nine-by-four-and-a-half-inch Multi-Rotor Propeller from APC is designed for quadcopters and other multi-rotor aircraft. Part of the MR family, it bridges the gap between the Thin Electric and Slow Flyer propeller lines, delivering a lighter feel with higher RPM potential for multi-rotor setups.

Designed for multi-rotor use, this prop is lighter than the Thin Electric series and provides higher RPM capability than the Slow Flyer family, offering efficient thrust and responsive handling on quadcopters and similar platforms. APC specifies a maximum RPM of 105,000 divided by the prop diameter in inches; for a 9-inch prop, that works out to roughly 11,700 RPM, helping balance performance with motor and prop safety.