RESISTANCE, PROPULSION AND MANEUVERABILITY CHARACTERISTICS OF MARAD SYSTEMATIC SERIES FOR LARGE FULL-FORM MERCHANT SHIPS

The original systematic series of low length-beam ratio, high block coefficient merchant ship forms developed for the U.S. Maritime Administration was extended to include beamdraft ratio variations between 3.00 and 4.50. Ten new models ranging from 20 to 27.5 feet in length were added to bring the total to sixteen for the current MARAD Series. The extended investigation was primarily devoted to planar-motion-mechanism tests and associated computer simulation studies to determine maneuverability characteristics, but resistance and propulsion tests related to those of the original Series were also performed. The fundamental data from the combined programs are consolidated in the form of a handbook suitable for direct use by naval architects, shipbuilders, and others concerned with design, economic or related studies pertaining to full-form ships of the type and range of proportions investigated. Included are: the nondimensional offsets and other pertinent geometrical data required to produce the hull lines for geometrically similar prototype ships of any size represented within the range of the Series; nondimensional charts and tables which can be used to predict the resistance, propulsion, inherent directional stability, and control characteristics for such prototype ships; and basic mathematical models for specified prototypes of each individual Series configuration which can be used in conjunction with a computer simulation facility to investigate the detailed deep-water maneuvering behavior of the corresponding ship systems. Also included along with the discussion are: merit comparisons, based on equal-volume prototypes of 350,000 tons full-load displacement, showing the effect of variation in geometric parameters on the resistance and propulsion characteristics; and numerical measures derived from simulated definitive maneuvers of these ships to be used in the development of rational maneuvering criteria for bulk carrier type ships with emphasis on those intended for restricted draft service.

• Supplemental Notes:
  • Available only to U.S. Companies through the Maritime Administration, Office of Maritime Technology, Washington, D.C. 20230.
• Corporate Authors:

  Hydronautics, Incorporated

  7210 Pindel School Road
  Laurel, MD  United States  20810
• Authors:
  • Gertler, M
  • Kohl, R E
• Publication Date: 1974-11

Media Info

• Features: Figures; References; Tables;
• Pagination: 232 p.

Subject/Index Terms

• TRT Terms: Bulk carriers; Computer aided design; Economic analysis; Energy consumption; Maneuvering; Mathematical models; Naval architecture; Propulsion; Ship simulators; Tests; Vehicle design
• Uncontrolled Terms: Ship design
• Old TRIS Terms: Model testing; Planar motion mechanism; Power prediction; Propulsion tests
• Subject Areas: Design; Economics; Energy; Marine Transportation; Terminals and Facilities; Vehicles and Equipment;

Filing Info

• Accession Number: 00148466
• Record Type: Publication
• Source Agency: Maritime Administration
• Report/Paper Numbers: No. 7370-1 Tech. Rpt.
• Contract Numbers: 1-35587
• Files: TRIS, USDOT
• Created Date: Feb 23 1977 12:00AM