COST SAVING BY SPECIAL HULL AND PROPULSION DESIGNS

The Burmeister & Wain principles for the saving of fuel by means of an unconventional design for the hull and hull/propeller combination have met with wide acceptance, and full-scale performance characteristics were confirmed in 1977 in sea trials on the Hamlet Alice, the prototype of B. & W's Hamlet Multi-flex series. In the present article, the hydrodynamic principles and features of this "economy" design, and some related problems, are explained and discussed and the results of model tests for different types of ship embodying the economy design features are briefly examined. The model tests concern designs for (i) the BC60E, which is the economy version of B. & W's 60,000-dwt Panamax bulk carrier, the BC60 (ii) a 20,000-dwt cargo ship, six of which are under construction; (iii) a 12,000-dwt multi-purpose cargo-ship six of which have been ordered; and (iv) a 20,000-dwt roll-on/roll-off ship. In the case of (iii), some results of sea trials are included for the Hamlet Alice. The respective results indicate considerable reductions in power requirement as compared with conventional designs, and similar results are expected from designs planned for 2,000-TEU container ships, 30,000-dwt bulk carriers, and 100,000-dwt shallow-draught tankers. The power reductions obtainable depend largely on how much the propeller diameter can be increased, and here the propulsion machinery will often be a limiting factor. Long-stroke Diesel engines or geared Diesel machinery seem to offer the best prospects. Order from BSRA as No. 50,659.

  • Corporate Authors:

    Seehafen-Verlag Erik Blumenfeld

    Celsiusweg 15, Postfach 1347
    2000 Hamburg 50,   Germany 
  • Publication Date: 1978-5

Media Info

  • Pagination: p. 138
  • Serial:
    • New Ships
    • Volume: 23
    • Publisher: Seehafen-Verlag Erik Blumenfeld

Subject/Index Terms

Filing Info

  • Accession Number: 00196026
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Jul 31 1979 12:00AM