ACTIVE RUDDERS WITH CONTROLLABLE PITCH PROPELLERS FOR THE AUXILIARY AND MANOEVRING PROPULSION OF SEAGOING SHIPS

The Author, of the Pleuger company, first gives some general information on the Pleuger active rudder, and describes different electrical arrangements for controlling the speed of the driving motor in those installations where control of the auxiliary-propeller thrust is required. For some ships, apart from the improved manoeuvrability offered by the active rudder, a prime requirement exists for auxiliary propulsion to enable the ship to proceed at very low speeds, i.e. below the minimum speed of 4 to 6 knots that can normally be obtained with Diesel propulsion, and the Author describes how this facility can be provided by an active rudder equipped with a controllable-pitch propeller. A c.p. main propeller would allow these very low ship-speeds to be achieved, but an active rudder fitted with a c.p. propeller will, in addition, provide improved manoeuvrabilty and will cost very much less than a c.p. main propeller. These considerations have led to active rudders of this type being selected for research ships and cable-layers, and also for passenger ships, such as those operating in the difficult waters between Finland and Sweden, which have to navigate at much reduced speeds for lengthy periods. The auxiliary propeller is feathered when not in use. In these installations, the pump unit for supplying hydraulic pressure for pitch changing can conveniently be housed in the steering flat; from here, the high-pressure lines are taken through the rudder stock and auxiliary propeller shaft to the propeller boss. These arrangements are briefly described, and a more detailed description is given of the system's control arrangements. It is mentioned that the Pleuger bow-thruster employs similar principles to those of the active rudder fitted with a c.p. propeller, except that the bow thruster does not require feathering. Order from BSRA as No. 52,320.

• Corporate Authors:

  Schroedter (C) and Company

  Stubbenhuk 10
  Hamburg 11,   Germany 
• Authors:
  • Zacharias, F J
• Publication Date: 1979-10

Language

• German

Media Info

• Pagination: p. 1535
• Serial:
  • HANSA
  • Volume: 116
  • Issue Number: N20
  • Publisher: Deutsche Bahn AG

Subject/Index Terms

• TRT Terms: Controllable pitch propellers; Maneuvering; Performance; Propellers; Rudders; Steerable propellers; Steering systems; Vehicle design
• Old TRIS Terms: Propeller rudder interaction
• Subject Areas: Design; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00310778
• Record Type: Publication
• Source Agency: British Ship Research Association
• Files: TRIS
• Created Date: May 7 1980 12:00AM