10×8 Folding Propeller A

Folding propeller, 10×8 (A version) — blades that fold back when the motor is not turning.

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.

The reason to fit a folding propeller is twofold — it survives the landing that a fixed blade would not, and it removes the drag of a stationary propeller in the glide.

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.