Xoar International LLC PJP-T-L 15x5 Precision Pair Carbon Fiber

The Xoar PJP-T-L 15x5 is a two-blade carbon fibre propeller from Xoar International LLC (USA), supplied as a precision pair from the PJP-T-L series for multicopter motors with a low KV rating. It measures 15 in in diameter with a 5 in pitch and belongs to the class of mid-sized multicopters. A precision pair means that both propellers are matched to each other.

The 5 in pitch is a third of the diameter: flat, laid out for hovering and efficiency at low rotational speed. The weight of 21 g is the average weight per propeller, with a tolerance of 2 g. The bore is 6 mm. As the maximum speed Xoar gives 7,000 rpm as the recommended upper bound. This value is comparable only within one manufacturer, because manufacturers define maximum speeds differently. The propeller does not fold.

Legally the aircraft counts: multicopters with 15 in propellers fall, depending on take-off mass, into class C2 (under 4 kg) or C3 (under 25 kg). From 250 g the operator must register, and the registration number belongs visibly on the aircraft. Classes C1 to C3 require direct remote ID.

On selection: low KV, bore and direction of rotation must fit the motor. Because the pair is supplied matched, both propellers are replaced together and not mixed with propellers from other batches. With carbon, frayed edges, nicks at the tip and dull-sounding areas point to delamination; such propellers are not flown further. The hub around the 6 mm bore is checked for cracks.