Karlstads Mekaniska Werkstad has developed a new rotatable nozzle thruster which gives stepless thrust control in any direction. The unit's design permits it to be removed and replaced under water with the aid of a patented cable system. The thruster is intended for use in dynamically- positioned vessels. The whole unit can be rotated through 360 degrees. The nozzle thruster has a pod and impeller similar to those incorporated in the company's KaMeWa steering propeller unit. The vertical stay is flanged to the rotating support and is journalled in roller bearings in a pivot casing bolted to the hull. Thruster is rotated by two slow-speed hydraulic-rotors via gearing to the rotating support. Blade seals have been tested through the equivalent of 9 million pitch changes at a water pressure corresponding to 40 m submersion, the company says. Extensive acoustic studies have permitted the low noise levels essential in dynamic-positioning to be attained.

  • Corporate Authors:

    Transportation Development Agency Centre

    800 rene-Leveque Boulevard West, Suite 600
    Montreal, Quebec H3B 1X9,   Canada 
  • Publication Date: 1976

Media Info

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Filing Info

  • Accession Number: 00142638
  • Record Type: Publication
  • Source Agency: Transportation Development Agency Centre
  • Files: TRIS
  • Created Date: Dec 15 1976 12:00AM