APPLICATION OF CONTRAROTATING PROPULSION SYSTEM TO A U.S. FLAG MERCHANT VESSEL. PHASE I, MODEL TESTING AND PRELIMINARY INSTALLATION DESIGN

The report describes the scale model test results for a contrarotating propulsion system applied to an existing high-speed trailership. The testing program included evaluation of two alternate propeller designs, each developed independently. The preliminary design of a contrarotating shafting system including an analysis of alignment conditions, principal vibration frequencies, and shaft stress levels is presented. A preliminary selection of contrarotating bearings and seals is offered, contingent on future full-scale tests. An economic evaluation is made of contrarotating propulsion for new construction, and for retrofit installations, based on the performance results of the model tests and preliminary estimates of construction costs. The study includes a sensitivity analysis of the effects of fuel price, discount, first cost, and price escalation on the net present value of a contrarotating installation. The report also outlines a program of future work based on the favorable results of the Phase I study.

  • Corporate Authors:

    Sun Ship, Incorporated

    Foot of Morton Avenue
    Chester, PA  USA  19013

    Maritime Administration

    Office of Commercial Development, 1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Forrest, A W
    • Swensson, G C
  • Publication Date: 1980-7

Media Info

  • Pagination: 261 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00327120
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: MA-RD-920-80072 Final Rpt.
  • Contract Numbers: MA-7-38068
  • Files: TRIS, USDOT
  • Created Date: Feb 18 1981 12:00AM