A natural evolution of the successful Promas, this system unites a new type of nozzle with an optimised propeller, hubcap, rudder bulb and a special rudder profile developed to provide very high steering forces yet minimise drag. It meets the requirements for large pulling power at low speed with a high free-running speed in transit. Components are designed to work together in a ducted system, maximising efficiency and minimising disturbances in the water flow both through and around the nozzle. Developed through CFD testing and analysis, the nozzle is a major advance on the profile used in conventional nozzle propeller installations. In a typical anchorhandler propulsion system it will reduce fuel consumption in transit by 15% or more, and improve bollard pull by around 5%. Depending on the exact requirements the rudder may be either a one-piece design or a medium flap type.
Propeller and rudder designed as a single system for optimum efficiency
Propulsive efficiency increased by 3 – 8 per cent
Nozzle option can reduce fuel consumption in transit by 15 per cent or more
Improved low speed manoeuvrability
Improved possibility for low pressure pulse/low noise propeller design
Almost as easy to install as a conventional propeller-rudder system
Simple and robust with short payback time