PROPELLERS FOR ECONOMY

Increased propeller efficiency can sometimes be achieved with significant gains, although in some cases a diminution of margins and provisions in relation to other aspects of performance may be involved. Although these remarks apply to the design of new ships, in the case of existing vessels, a much more cogent case can be made for improvement, as almost innvariably ship's logs reveal that following years in service, the operating conditions are remote from those for which the propeller was designed. Improvements of a significant order can be achieved and this is particularly the case if for reasons of economy, an Owner has decided to use a reduced operating speed. Advantage can also be taken at this stage of new propeller techniques, as the condition of the existing propeller may hve deteriorated to some extent. The present paper explores the possibilities in in relation to propulsive economy under the changing conditions now applying.

• Supplemental Notes:
  • Shipboard Energy Conservation '80, presented by the New York Metropolitan Section of SNAME, New York, New York, September 22-23, 1980.
• Corporate Authors:

  Society of Naval Architects and Marine Engineers

  601 Pavonia Avenue
  Jersey City, NJ  United States  07306-2907
• Authors:
  • Sinclair, L L
  • Eames, CFW
• Publication Date: 1980

Media Info

• Features: References;
• Pagination: p. 331-342
• Serial:
  • Publication of: Society of Naval Architects and Marine Engineers
  • Publisher: Society of Naval Architects and Marine Engineers

Subject/Index Terms

• TRT Terms: Contrarotating propellers; Controllable pitch propellers; Ducted propellers; Engine efficiency; Hulls; Propellers; Propulsion; Roughness; Screw propellers; Vehicle design; Vehicle maintenance
• Old TRIS Terms: Hull roughness; Propeller design; Propeller efficiency; Propeller repair; Propulsive efficiency
• Subject Areas: Design; Maintenance and Preservation; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00322777
• Record Type: Publication
• Report/Paper Numbers: Session I-B
• Files: TRIS
• Created Date: Nov 29 1980 12:00AM