Results so far achieved with sail-assisted merchant ships have not convinced the Authors of the economic feasibility of these designs. Designing for the utilisation of wind energy by motor ships can start from these assumptions: <i> Only comparatively high wind-speeds can be used economically. <ii> The stability of the ship should not be impaired at high wind-speeds. <iii> The rig must be technically cost-effective, uncomplicated, safe and automatically controlled. A combination of these conditions implies a motor ship with a small sail-area, generally capable of only a minor saving in fuel, whereas the objective should be a 20 - 30 p.a. reduction in fuel consumption. The Authors discuss this problem and present a solution, the subject of a German patent, in which the rig has one mast and the single rectangular sail <made, e.g., of canvas> is secured to two vertical yards, one on each side of the mast and parallel to it. The yards can be run to and from the mast, so reducing or increasing the sail area as the sail rolls or unrolls, bya geared mechanical arrangement, and the mast and sail can be turned to an angle to suit the wind direction. This proposed "non-aerodynamic" rig is shown in drawings,

  • Supplemental Notes:
    • Hansa, 120 <1983>, p.1012 <No.11, June> (3 pp., 13 ref., 2 tab., 5 graphs, 3 diag.)
  • Authors:
    • Bernaerts, A
    • Kurmis, V
  • Publication Date: 1983


  • German

Subject/Index Terms

  • Subject Areas: Marine Transportation;

Filing Info

  • Accession Number: 00684791
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Aug 14 1995 12:00AM