Propeller boss cap fins products

Kongsberg Maritime

Promas propulsion & manoeuvring system

Integrated propeller-rudder system

Energy-saving integration of propeller, costa bulb, hub cap and twisted rudder; 3–8% saving claimed on single-screw ships.

MOL Techno-Trade (PBCF)

PBCF (Propeller Boss Cap Fins)

Propeller boss cap fins

Finned propeller cap that breaks up the hub vortex; about 3–5% fuel/CO2 saving claimed, over 4,500 ships fitted, retrofittable.

Wärtsilä

Wärtsilä EnergoProFin

Propeller boss cap fins

Boss cap fins recovering hub-vortex energy; about 2% typical savings, up to 5%.