For small ships with installed power below 10,000 kW, heavy fuel operation is often cited as the way to reduce running costs. However, the ship and the propeller also hold potential fuel-saving possibilities. The three factors involved are discussed, namely ship resistance, heavy fuel operation, and propeller efficiency. The only way of predicting ship resistance is by testing a model. This is expensive and for small ships, such as coasters or trawlers, prediction is often based on experience with similar ships. The result is that too much engine power is often specified for only a very small increase in speed. A more adequate method is to use a computer program to make a quick analysis of the ship's performance with alternative engine and propeller installations. In the engine power range 1,000-10,000 kW, suitable for operation on heavy fuel, a typical heavy fuel calculation for a ship such as a trawler is presented. Very thorough computer programs have been developed for calculating propeller performance, and comparison between different propeller installations are easy to make. Order from BSRA as No. 54,570.

  • Corporate Authors:

    Reed (Thomas) Industrial Press Limited

    36/37 Cock Lane, Saracen's Head Building
    London EC1A 9BY,   England 
  • Authors:
    • Pontoppidan, L
  • Publication Date: 1980

Media Info

  • Pagination: p. 10
  • Serial:
    • Special Ships
    • Volume: 3
    • Publisher: Reed (Thomas) Industrial Press Limited

Subject/Index Terms

Filing Info

  • Accession Number: 00329886
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Mar 12 1981 12:00AM