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RDT development, testing and pilots
Case Ferry 2010
In a spectacular ferry crossing...
The project “Eiksund” – a ferry built 40 years ago – is the first
ship in commercial operation to have Brunvoll Azimuth Rim
Driven Thrusters (RDTs) installed for main propulsion.
After running for more than 160,000 hours, the ferry’s old
diesel engine and propulsion system needed replacement.
Brunvoll engineers saw an opportunity to test its RDT
technology on the fjord “next door” to its facilities.
Ferry operator Fjord1 was keen to try out new propulsion
technology to reduce operating costs and emissions.
Major challenges of this project:
• Continuous operation
• High load
• Side forces during steering in transit
• Design of Rim Driven propeller blades for main propulsion
The partners in a unique
industrial R&D collaboration
Fjord1 – the operator of the “Eiksund” – is one of Norway’s
largest transport companies. Fjord1 operates many of the
ferries on the coastline of western Norway. Its fleet consists
of more than 60 ferries and some 17 other vessels.
This forward-looking enterprise is concerned with green
technology and has attracted attention for its use of natural
gas ferries, which dramatically reduce NOx emissions.
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