Eagle power UC3210L 32 inch 1 Pair in CW+CCW Carbon fiber Propeller

Eagle Power UC3210 — a 32-inch carbon fibre propeller from the UC range.

Carbon fibre is used for these because it is stiff for its weight: a stiff blade does not flex under load, so the thrust the motor produces goes into lifting the aircraft rather than into deforming the propeller. The rigidity also keeps the blades from flapping, which sets the practical diameter limit on a given airframe.

The propeller has to be matched to the motor KV and the cell count, since the load a blade places on the motor is what determines whether the power system runs within its ratings.

Supplied as 1 pair in matched CW/CCW pairs, which is how a multirotor needs them — counter-rotating pairs cancel torque. The CW and CCW blades are supplied together so a full set of counter-rotating propellers can be fitted from one order.