The paper discusses the propellers, hull, and possible suitable propulsion machinery that would be utilized on a one million ton tanker to give it a reasonable service speed of sixteen knots. The paper handles the problems as though a design based on sound practice is required immediately. Five hundred thousand, seven hundred fifty thousand, and one million ton tankers are discussed with particular emphasis on propeller designs and arrangements. The relative merits of single, double, and triple screw arrangements are compared on the basis of prop size, power distribution among the propellers, optimum prop RPM, and total shaft horsepower required. A triple screw design seems most feasible from an economic and ship manuverability viewpoint. A description of a possible machinery layout for such a tanker is included. It consists of a triple screw, ninety five thousand shaft horsepower, steam plant incorporating 3 cross-compounding steam turbines for the main drive. This design stresses the use of large diameter propellers turning at an optimum speed of sixty RPM. Other basic components are discussed from the viewpoints of current availability and reliability under the working conditions proposed. The paper gives an overall starting point from which actual designs can be formulated for such tankers.

  • Availability:
  • Supplemental Notes:
    • Institute of Marine Engineers
  • Authors:
    • Milne, P A
  • Publication Date: 1971

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Filing Info

  • Accession Number: 00019598
  • Record Type: Publication
  • Source Agency: United States Merchant Marine Academy
  • Files: TRIS
  • Created Date: Nov 25 1973 12:00AM