8×6 Folding Propeller

This is a 8×6 folding propeller — a folding blade set for electric model aircraft, where the blades fold back along the fuselage when the motor stops.

The first figure is the diameter in inches and the second is the pitch: the pitch is the theoretical distance the propeller would advance in one revolution in a solid medium. A higher pitch at the same diameter loads the motor more and produces more speed; a lower pitch produces more thrust at lower speed. Getting that pair right matters more than the propeller’s brand, because the load it places on the motor decides whether the power system runs inside its ratings.

Folding propellers are used because a fixed blade cannot survive a landing where the propeller touches the ground, and because a folded propeller reduces drag dramatically when the motor is stopped — which is what a glider or a powered sailplane needs.

Supplied as a blade pair, so it suits a hub designed for this size; check the hub bore and the root thickness against the blades before ordering, since folding hubs are not interchangeable between sizes.