THE SCHOTTEL BOW-JET--A NEW MANOEUVRING AID

The Schottel Bow-Jet (the "Bugjet") and the Schottel Jet are tow unconventional bow-thrusters developed by this company in recent years, and are particularly suitable for shallow-draught vessels. Each is offered in four sizes in the 50-kW to 370-kW range. The "bow-jet", or SBJ, is a transverse thruster in which the water is drawn upwards by a ducted Kaplan propeller on a vertical shaft (driven by a Diesel engine or other means); after passing through the propeller, the water is deflected into a port or starboard outlet tunnel by a two-position hydraulically-operated shutter. The "jet", or SJ, is generally similar to the SBJ, but can produce thrust in any direction, through an elbow-shaped deflector that can be turned to direct the water outwards at any desired angle. In addition to being used as a manoeuvring device, the SJ could propel such craft as lighters for movement in harbour. The article describes both these devices, and includes curves showing their static thrust against their installed power. A description, with general-arrangement drawings, is also given of a Schottel Navigator Bow-Jet; this is an SBJ unit supplied (like the Schottel Navigator Rudder-Propeller) complete with prime mover and accessories and ready for installation. The unit described has been installed in a new ferry built by the Jos. L. Meyer shipyard, Papenburg/Ems, for Norden-Frisia, of Norddeich (near Emden), and incorporates an SBJ 140 bow-jet with a 1,400-mm diameter propeller driven by a 12-cylinder V-type water-cooled engine developing 265 kW at 2,200 rpm; the engine is mounted on an extension of the tunnel. Before delivery, the complete unit with assembled in a test basin, tested, and accepted by Germanischer Lloyd. Order from BSRA as No. 49,818.

  • Corporate Authors:

    Schroedter (C) and Company

    Stubbenhuk 10
    Hamburg 11,   Germany 
  • Publication Date: 1978-9

Language

  • German

Media Info

  • Pagination: p. 1361
  • Serial:
    • HANSA
    • Volume: 115
    • Issue Number: 17
    • Publisher: Deutsche Bahn AG

Subject/Index Terms

Filing Info

  • Accession Number: 00189182
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Apr 25 1979 12:00AM