Seven Seas Voyager, the new 50,000-gt cruise ship under construction at T. Mariotti Shipyard in Genoa, Italy for Radisson Seven Seas
, will be among the first ships to house the new Dolphin podded propulsion system jointly developed by STN Atlas Marine Electronics
and John Crane-Lips
The vessel, which is scheduled for a 2003 delivery will boast podded propulsors delivering 2 x 7,000 kW at 170 rpm. Main features include integration of a powerful electric drive into a hydro-dynamically optimized pod below ship, resulting in a directly-driven propeller.
Extensive CFD analyses and model tank tests have led to the development of a pod shape with enhanced efficiency and maneuvering characteristics.
The Dolphin system has been developed for power ranges extending from 3 MW to more than 19 MW and is suitable for a variety of vessels designed for high speed and good maneuverability operation. The standard drive of the fixed-pitch propeller includes and air-cooled six-phase synchronous motor; gears, shaft systems, rudders and stern thrusters forming part of conventional electric drives are not required.
In addition to Dolphin, the focus of the delivery by STN Atlas and John Crane-Lips for Seven Seas Voyager also includes a complete propulsion system with synchro-converters, control and joystick system, diesel alternators and a high-voltage distribution assembly with propulsion and main transformers as well as bow thrusters.