• Underwater propeller cone fin installation offers immediate fuel savings

    Underwater propeller cone fin installation offers immediate fuel savings


    Last month Hydrex installed a propeller cone fin on a general cargo vessel. This operation was carried out in Antwerp, but can be performed economically almost anywhere. As a result of the underwater operation an owner can instantly start benefitting from the fuel savings a propeller cone fin brings. He does not have to wait until the next scheduled drydocking for the installation.

    Propeller caps like these can recover energy loss of a propeller hub vortex in the propeller’s slipstream. This decreases fuel consumption from 3% up to 5% and reduces cavitation on rudders and hulls. Hydrex can install propeller cone fins underwater on any size and make of propeller, on both new build or in-service vessels.

    Installation afloat prevents a long wait for fuel savings

    Hydrex carries out these operations following the specific procedures required by the involved OEM, adapted for an installation afloat. A team of our diver/technicians mobilizes to the vessel’s location. After a preliminary inspection the divers remove the propeller cap and clean the flange where the device is to be installed. They then lower the propeller cone into the water and position it on the propeller. The bolts are then put on torque and secured with wire if needed. Hydrex teams can work in shifts around the clock to finish the operation as quickly as possible.

    The owner of the vessel can start enjoying the fuel savings the propulsion improving device creates right away. Having to wait for the next scheduled drydocking to have the propeller cone fin installed can lose  him up to two years of fuel savings. In contrast, he will have earned back the cost of the underwater installation in only a few months. The savings are considerable.