Biela 23x14 Carbon Turboprop 5-Blade Propeller - Black with White TipsBiela Propellers are high quality propellers hand crafted in Poland. They have hollow blades, solid hubs, solid tips, and a hard, durable gel-coat finish. Biela props are some of the finest propellers in the world. The finish is impeccable. The shapes are scale like. The performance is wonderful.
Propellers marked with "D" have variable pitch. These are more efficient and are quieter. Bigger pitch at the hub and elongated profile gives very good cooling during "3D" maneuvers.